66686264 has 16 divisors (see below), whose sum is σ = 125123400. Its totient is φ = 33320032.

The previous prime is 66686261. The next prime is 66686287. The reversal of 66686264 is 46268666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66686261) 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, 21074 + ... + 24030.

Almost surely, 2^66686264 is an apocalyptic number.

It is an amenable number.

66686264 is a deficient number, since it is larger than the sum of its proper divisors (58437136).

66686264 is a wasteful number, since it uses less digits than its factorization.

66686264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5782 (or 5778 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The square root of 66686264 is about 8166.1658077705. The cubic root of 66686264 is about 405.5198607923.

The spelling of 66686264 in words is "sixty-six million, six hundred eighty-six thousand, two hundred sixty-four".