64971330 has 16 divisors (see below), whose sum is σ = 155931264. Its totient is φ = 17325680.

The previous prime is 64971329. The next prime is 64971337. The reversal of 64971330 is 3317946.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 64971291 and 64971300.

It is not an unprimeable number, because it can be changed into a prime (64971337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082826 + ... + 1082885.

It is an arithmetic number, because the mean of its divisors is an integer number (9745704).

Almost surely, 2^64971330 is an apocalyptic number.

64971330 is an abundant number, since it is smaller than the sum of its proper divisors (90959934).

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

64971330 is a wasteful number, since it uses less digits than its factorization.

64971330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165721.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 64971330 is about 8060.4795142721. The cubic root of 64971330 is about 402.0134521872.

The spelling of 64971330 in words is "sixty-four million, nine hundred seventy-one thousand, three hundred thirty".