166501155506 has 16 divisors (see below), whose sum is σ = 302220585216. Its totient is φ = 67160129856.

The previous prime is 166501155481. The next prime is 166501155521. The reversal of 166501155506 is 605551105661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349792106 + ... + 349792581.

It is an arithmetic number, because the mean of its divisors is an integer number (18888786576).

Almost surely, 2^166501155506 is an apocalyptic number.

166501155506 is a deficient number, since it is larger than the sum of its proper divisors (135719429710).

166501155506 is a wasteful number, since it uses less digits than its factorization.

166501155506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699584713.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 166501155506 in words is "one hundred sixty-six billion, five hundred one million, one hundred fifty-five thousand, five hundred six".