66464456 has 16 divisors (see below), whose sum is σ = 126329100. Its totient is φ = 32776704.

The previous prime is 66464443. The next prime is 66464459. The reversal of 66464456 is 65446466.

It can be written as a sum of positive squares in 2 ways, for example, as 66161956 + 302500 = 8134^2 + 550^2 .

It is a super-2 number, since 2×66464456² = 8835047822751872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66464459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56321 + ... + 57488.

Almost surely, 2^66464456 is an apocalyptic number.

It is an amenable number.

66464456 is a deficient number, since it is larger than the sum of its proper divisors (59864644).

66464456 is a wasteful number, since it uses less digits than its factorization.

66464456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113888 (or 113884 counting only the distinct ones).

The product of its digits is 414720, while the sum is 41.

The square root of 66464456 is about 8152.5735813913. The cubic root of 66464456 is about 405.0697558048.

The spelling of 66464456 in words is "sixty-six million, four hundred sixty-four thousand, four hundred fifty-six".