64677321 has 6 divisors (see below), whose sum is σ = 93422810. Its totient is φ = 43118208.

The previous prime is 64677307. The next prime is 64677329. The reversal of 64677321 is 12377646.

64677321 is a `hidden beast` number, since 646 + 7 + 7 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64641600 + 35721 = 8040^2 + 189^2 .

It is not a de Polignac number, because 64677321 - 2⁶ = 64677257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64677329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3593176 + ... + 3593193.

Almost surely, 2^64677321 is an apocalyptic number.

It is an amenable number.

64677321 is a deficient number, since it is larger than the sum of its proper divisors (28745489).

64677321 is a wasteful number, since it uses less digits than its factorization.

64677321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7186375 (or 7186372 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 64677321 is about 8042.2211484142. The cubic root of 64677321 is about 401.4061365743.

The spelling of 64677321 in words is "sixty-four million, six hundred seventy-seven thousand, three hundred twenty-one".