166155402 has 16 divisors (see below), whose sum is σ = 379783872. Its totient is φ = 47472960.

The previous prime is 166155401. The next prime is 166155439. The reversal of 166155402 is 204551661.

166155402 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166155402² = 55215235227563208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166155402.

It is not an unprimeable number, because it can be changed into a prime (166155401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1977999 + ... + 1978082.

It is an arithmetic number, because the mean of its divisors is an integer number (23736492).

Almost surely, 2^166155402 is an apocalyptic number.

166155402 is an abundant number, since it is smaller than the sum of its proper divisors (213628470).

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

166155402 is a wasteful number, since it uses less digits than its factorization.

166155402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956093.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 166155402 is about 12890.1280831495. The cubic root of 166155402 is about 549.7579121911.

The spelling of 166155402 in words is "one hundred sixty-six million, one hundred fifty-five thousand, four hundred two".