166156620 has 48 divisors (see below), whose sum is σ = 531702528. Its totient is φ = 37978560.

The previous prime is 166156607. The next prime is 166156633. The reversal of 166156620 is 26651661.

It is an interprime number because it is at equal distance from previous prime (166156607) and next prime (166156633).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197386 + ... + 198225.

It is an arithmetic number, because the mean of its divisors is an integer number (11077136).

Almost surely, 2^166156620 is an apocalyptic number.

166156620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166156620 is an abundant number, since it is smaller than the sum of its proper divisors (365545908).

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

166156620 is a wasteful number, since it uses less digits than its factorization.

166156620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395630 (or 395628 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 166156620 is about 12890.1753285206. The cubic root of 166156620 is about 549.7592555189.

The spelling of 166156620 in words is "one hundred sixty-six million, one hundred fifty-six thousand, six hundred twenty".