64666472 has 32 divisors (see below), whose sum is σ = 130909800. Its totient is φ = 29769984.

The previous prime is 64666451. The next prime is 64666489. The reversal of 64666472 is 27466646.

It can be written as a sum of positive squares in 4 ways, for example, as 43744996 + 20921476 = 6614^2 + 4574^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73298 + ... + 74174.

Almost surely, 2^64666472 is an apocalyptic number.

It is an amenable number.

64666472 is an abundant number, since it is smaller than the sum of its proper divisors (66243328).

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

64666472 is a wasteful number, since it uses less digits than its factorization.

64666472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1601 counting only the distinct ones).

The product of its digits is 290304, while the sum is 41.

The square root of 64666472 is about 8041.5466174114. The cubic root of 64666472 is about 401.3836913100.

The spelling of 64666472 in words is "sixty-four million, six hundred sixty-six thousand, four hundred seventy-two".