664022151 has 32 divisors (see below), whose sum is σ = 1069752320. Its totient is φ = 404639712.

The previous prime is 664022143. The next prime is 664022153. The reversal of 664022151 is 151220466.

664022151 is a `hidden beast` number, since 6 + 640 + 2 + 2 + 15 + 1 = 666.

It is not a de Polignac number, because 664022151 - 2³ = 664022143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664022153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26970 + ... + 45336.

It is an arithmetic number, because the mean of its divisors is an integer number (33429760).

Almost surely, 2^664022151 is an apocalyptic number.

664022151 is a deficient number, since it is larger than the sum of its proper divisors (405730169).

664022151 is a wasteful number, since it uses less digits than its factorization.

664022151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18492 (or 18486 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 664022151 is about 25768.6272626231. The cubic root of 664022151 is about 872.4238354107.

The spelling of 664022151 in words is "six hundred sixty-four million, twenty-two thousand, one hundred fifty-one".