66707764 has 12 divisors (see below), whose sum is σ = 118145664. Its totient is φ = 32951864.

The previous prime is 66707741. The next prime is 66707777. The reversal of 66707764 is 46770766.

It is a self number, because there is not a number n which added to its sum of digits gives 66707764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100132 + ... + 100795.

It is an arithmetic number, because the mean of its divisors is an integer number (9845472).

Almost surely, 2^66707764 is an apocalyptic number.

It is an amenable number.

66707764 is a deficient number, since it is larger than the sum of its proper divisors (51437900).

66707764 is a wasteful number, since it uses less digits than its factorization.

66707764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201014 (or 201012 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 43.

The square root of 66707764 is about 8167.4821089489. The cubic root of 66707764 is about 405.5634366837.

The spelling of 66707764 in words is "sixty-six million, seven hundred seven thousand, seven hundred sixty-four".