664900740075 has 96 divisors (see below), whose sum is σ = 1291869815040. Its totient is φ = 297490060800.

The previous prime is 664900740059. The next prime is 664900740089. The reversal of 664900740075 is 570047009466.

It is not a de Polignac number, because 664900740075 - 2⁴ = 664900740059 is a prime.

It is a super-2 number, since 2×664900740075² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 48073261 + ... + 48087089.

It is an arithmetic number, because the mean of its divisors is an integer number (13456977240).

Almost surely, 2^664900740075 is an apocalyptic number.

664900740075 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

664900740075 is a deficient number, since it is larger than the sum of its proper divisors (626969074965).

664900740075 is a wasteful number, since it uses less digits than its factorization.

664900740075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18349 (or 18344 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 664900740075 in words is "six hundred sixty-four billion, nine hundred million, seven hundred forty thousand, seventy-five".