66764312 has 24 divisors (see below), whose sum is σ = 127632540. Its totient is φ = 32741280.

The previous prime is 66764303. The next prime is 66764323. The reversal of 66764312 is 21346766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20987 + ... + 23957.

Almost surely, 2^66764312 is an apocalyptic number.

It is an amenable number.

66764312 is a deficient number, since it is larger than the sum of its proper divisors (60868228).

66764312 is a wasteful number, since it uses less digits than its factorization.

66764312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3083 (or 3026 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 66764312 is about 8170.9431524151. The cubic root of 66764312 is about 405.6780026782.

It can be divided in two parts, 66764 and 312, that added together give a palindrome (67076).

The spelling of 66764312 in words is "sixty-six million, seven hundred sixty-four thousand, three hundred twelve".