156021066 has 24 divisors (see below), whose sum is σ = 350566944. Its totient is φ = 52006860.

The previous prime is 156021049. The next prime is 156021077. The reversal of 156021066 is 660120651.

It is a happy number.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160030 + ... + 161001.

It is an arithmetic number, because the mean of its divisors is an integer number (14606956).

Almost surely, 2^156021066 is an apocalyptic number.

156021066 is an abundant number, since it is smaller than the sum of its proper divisors (194545878).

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

156021066 is an equidigital number, since it uses as much as digits as its factorization.

156021066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321048 (or 321036 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 156021066 is about 12490.8392832507. The cubic root of 156021066 is about 538.3454914764.

The spelling of 156021066 in words is "one hundred fifty-six million, twenty-one thousand, sixty-six".