166051655 has 32 divisors (see below), whose sum is σ = 256462848. Its totient is φ = 100166400.

The previous prime is 166051619. The next prime is 166051663. The reversal of 166051655 is 556150661.

It is not a de Polignac number, because 166051655 - 2⁶ = 166051591 is a prime.

It is a super-3 number, since 3×166051655³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4979 + ... + 18891.

It is an arithmetic number, because the mean of its divisors is an integer number (8014464).

Almost surely, 2^166051655 is an apocalyptic number.

166051655 is a deficient number, since it is larger than the sum of its proper divisors (90411193).

166051655 is a wasteful number, since it uses less digits than its factorization.

166051655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13967.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 166051655 is about 12886.1031735742. The cubic root of 166051655 is about 549.6434658986.

The spelling of 166051655 in words is "one hundred sixty-six million, fifty-one thousand, six hundred fifty-five".