664164615 has 32 divisors (see below), whose sum is σ = 1126619136. Its totient is φ = 333521280.

The previous prime is 664164607. The next prime is 664164623. The reversal of 664164615 is 516461466.

It is a happy number.

664164615 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (664164607) and next prime (664164623).

It is not a de Polignac number, because 664164615 - 2³ = 664164607 is a prime.

It is a super-2 number, since 2×664164615² = 882229271636196450, which contains 22 as substring.

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, 2097 + ... + 36506.

It is an arithmetic number, because the mean of its divisors is an integer number (35206848).

Almost surely, 2^664164615 is an apocalyptic number.

664164615 is a deficient number, since it is larger than the sum of its proper divisors (462454521).

664164615 is a wasteful number, since it uses less digits than its factorization.

664164615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38679.

The product of its digits is 103680, while the sum is 39.

The square root of 664164615 is about 25771.3914059757. The cubic root of 664164615 is about 872.4862229388.

The spelling of 664164615 in words is "six hundred sixty-four million, one hundred sixty-four thousand, six hundred fifteen".