64724604066 has 20 divisors (see below), whose sum is σ = 145031057622. Its totient is φ = 21574867968.

The previous prime is 64724604047. The next prime is 64724604079. The reversal of 64724604066 is 66040642746.

64724604066 is a `hidden beast` number, since 64 + 72 + 460 + 4 + 0 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 36987367041 + 27737237025 = 192321^2 + 166545^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 199767135 + ... + 199767458.

Almost surely, 2^64724604066 is an apocalyptic number.

64724604066 is an abundant number, since it is smaller than the sum of its proper divisors (80306453556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64724604066 is a wasteful number, since it uses less digits than its factorization.

64724604066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399534607 (or 399534598 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 45.

The spelling of 64724604066 in words is "sixty-four billion, seven hundred twenty-four million, six hundred four thousand, sixty-six".