66916464 has 40 divisors (see below), whose sum is σ = 173298432. Its totient is φ = 22249920.

The previous prime is 66916463. The next prime is 66916511. The reversal of 66916464 is 46461966.

66916464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66916463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20719 + ... + 23729.

Almost surely, 2^66916464 is an apocalyptic number.

It is an amenable number.

66916464 is an abundant number, since it is smaller than the sum of its proper divisors (106381968).

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

66916464 is a wasteful number, since it uses less digits than its factorization.

66916464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3485 (or 3479 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 66916464 is about 8180.2484069862. The cubic root of 66916464 is about 405.9859410955.

The spelling of 66916464 in words is "sixty-six million, nine hundred sixteen thousand, four hundred sixty-four".