156866220 has 336 divisors, whose sum is σ = 594941760. Its totient is φ = 33965568.

The previous prime is 156866207. The next prime is 156866221. The reversal of 156866220 is 22668651.

156866220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (156866221) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 2959714 + ... + 2959766.

It is an arithmetic number, because the mean of its divisors is an integer number (1770660).

Almost surely, 2^156866220 is an apocalyptic number.

156866220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156866220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297470880).

156866220 is an abundant number, since it is smaller than the sum of its proper divisors (438075540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156866220 is a wasteful number, since it uses less digits than its factorization.

156866220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 156866220 is about 12524.6245452708. The cubic root of 156866220 is about 539.3158001264.

The spelling of 156866220 in words is "one hundred fifty-six million, eight hundred sixty-six thousand, two hundred twenty".