664503500451 has 32 divisors (see below), whose sum is σ = 1072341504000. Its totient is φ = 357312900096.

The previous prime is 664503500449. The next prime is 664503500467. The reversal of 664503500451 is 154005305466.

It is not a de Polignac number, because 664503500451 - 2¹ = 664503500449 is a prime.

It is a super-2 number, since 2×664503500451² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664503500471) 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, 1758175 + ... + 2102423.

It is an arithmetic number, because the mean of its divisors is an integer number (33510672000).

Almost surely, 2^664503500451 is an apocalyptic number.

664503500451 is a deficient number, since it is larger than the sum of its proper divisors (407838003549).

664503500451 is a wasteful number, since it uses less digits than its factorization.

664503500451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349683.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 664503500451 in words is "six hundred sixty-four billion, five hundred three million, five hundred thousand, four hundred fifty-one".