427605664 has 12 divisors (see below), whose sum is σ = 841848714. Its totient is φ = 213802816.

The previous prime is 427605623. The next prime is 427605677. The reversal of 427605664 is 466506724.

It can be written as a sum of positive squares in only one way, i.e., 411765264 + 15840400 = 20292^2 + 3980^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6681307 + ... + 6681370.

Almost surely, 2^427605664 is an apocalyptic number.

It is an amenable number.

427605664 is a deficient number, since it is larger than the sum of its proper divisors (414243050).

427605664 is a wasteful number, since it uses less digits than its factorization.

427605664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13362687 (or 13362679 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 427605664 is about 20678.6281943460. The cubic root of 427605664 is about 753.3806874106.

The spelling of 427605664 in words is "four hundred twenty-seven million, six hundred five thousand, six hundred sixty-four".