664652051 has 32 divisors (see below), whose sum is σ = 799303680. Its totient is φ = 540942336.

The previous prime is 664652039. The next prime is 664652063. The reversal of 664652051 is 150256466.

It is an interprime number because it is at equal distance from previous prime (664652039) and next prime (664652063).

It is a cyclic number.

It is not a de Polignac number, because 664652051 - 2²² = 660457747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664652251) 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, 1882691 + ... + 1883043.

It is an arithmetic number, because the mean of its divisors is an integer number (24978240).

Almost surely, 2^664652051 is an apocalyptic number.

664652051 is a deficient number, since it is larger than the sum of its proper divisors (134651629).

664652051 is a wasteful number, since it uses less digits than its factorization.

664652051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 664652051 is about 25780.8465919954. The cubic root of 664652051 is about 872.6996124049.

The spelling of 664652051 in words is "six hundred sixty-four million, six hundred fifty-two thousand, fifty-one".