166051651 has 16 divisors (see below), whose sum is σ = 180164160. Its totient is φ = 152570880.

The previous prime is 166051619. The next prime is 166051663. The reversal of 166051651 is 156150661.

It is a cyclic number.

It is not a de Polignac number, because 166051651 - 2⁵ = 166051619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166051451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160231 + ... + 161263.

It is an arithmetic number, because the mean of its divisors is an integer number (11260260).

Almost surely, 2^166051651 is an apocalyptic number.

166051651 is a deficient number, since it is larger than the sum of its proper divisors (14112509).

166051651 is a wasteful number, since it uses less digits than its factorization.

166051651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 166051651 is about 12886.1030183683. The cubic root of 166051651 is about 549.6434614852.

The spelling of 166051651 in words is "one hundred sixty-six million, fifty-one thousand, six hundred fifty-one".