664702726470575 has 12 divisors (see below), whose sum is σ = 887633794733448. Its totient is φ = 490857398008800.

The previous prime is 664702726470551. The next prime is 664702726470581. The reversal of 664702726470575 is 575074627207466.

It is not a de Polignac number, because 664702726470575 - 2³⁶ = 664634006993839 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 1022619578861 + ... + 1022619579510.

It is an arithmetic number, because the mean of its divisors is an integer number (73969482894454).

Almost surely, 2^{664702726470575} is an apocalyptic number.

664702726470575 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

664702726470575 is a deficient number, since it is larger than the sum of its proper divisors (222931068262873).

664702726470575 is a wasteful number, since it uses less digits than its factorization.

664702726470575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045239158394 (or 2045239158389 counting only the distinct ones).

The product of its (nonzero) digits is 829785600, while the sum is 68.

The spelling of 664702726470575 in words is "six hundred sixty-four trillion, seven hundred two billion, seven hundred twenty-six million, four hundred seventy thousand, five hundred seventy-five".