66323864 has 16 divisors (see below), whose sum is σ = 124448400. Its totient is φ = 33137632.

The previous prime is 66323861. The next prime is 66323879. The reversal of 66323864 is 46832366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66323861) 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, 14549 + ... + 18555.

It is an arithmetic number, because the mean of its divisors is an integer number (7778025).

Almost surely, 2^66323864 is an apocalyptic number.

It is an amenable number.

66323864 is a deficient number, since it is larger than the sum of its proper divisors (58124536).

66323864 is a wasteful number, since it uses less digits than its factorization.

66323864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6082 (or 6078 counting only the distinct ones).

The product of its digits is 124416, while the sum is 38.

The square root of 66323864 is about 8143.9464634783. The cubic root of 66323864 is about 404.7839400326.

The spelling of 66323864 in words is "sixty-six million, three hundred twenty-three thousand, eight hundred sixty-four".