664322500527 has 32 divisors (see below), whose sum is σ = 1080588165120. Its totient is φ = 354567961440.

The previous prime is 664322500519. The next prime is 664322500529. The reversal of 664322500527 is 725005223466.

It is a happy number.

It is not a de Polignac number, because 664322500527 - 2³ = 664322500519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664322500529) 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, 11696803 + ... + 11753460.

It is an arithmetic number, because the mean of its divisors is an integer number (33768380160).

Almost surely, 2^664322500527 is an apocalyptic number.

664322500527 is a deficient number, since it is larger than the sum of its proper divisors (416265664593).

664322500527 is a wasteful number, since it uses less digits than its factorization.

664322500527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23450363.

The product of its (nonzero) digits is 604800, while the sum is 42.

The spelling of 664322500527 in words is "six hundred sixty-four billion, three hundred twenty-two million, five hundred thousand, five hundred twenty-seven".