166164540 has 48 divisors (see below), whose sum is σ = 474048288. Its totient is φ = 43473664.

The previous prime is 166164533. The next prime is 166164553. The reversal of 166164540 is 45461661.

It is a happy number.

It is a super-2 number, since 2×166164540² = 55221308706823200, which contains 22 as substring.

It is a congruent number.

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, 22947 + ... + 29306.

It is an arithmetic number, because the mean of its divisors is an integer number (9876006).

Almost surely, 2^166164540 is an apocalyptic number.

166164540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166164540 is an abundant number, since it is smaller than the sum of its proper divisors (307883748).

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

166164540 is a wasteful number, since it uses less digits than its factorization.

166164540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52318 (or 52316 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 166164540 is about 12890.4825355764. The cubic root of 166164540 is about 549.7679902980.

The spelling of 166164540 in words is "one hundred sixty-six million, one hundred sixty-four thousand, five hundred forty".