66976636 has 12 divisors (see below), whose sum is σ = 117271000. Its totient is φ = 33470640.

The previous prime is 66976627. The next prime is 66976639. The reversal of 66976636 is 63667966.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66976636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66976639) 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, 7951 + ... + 14041.

Almost surely, 2^66976636 is an apocalyptic number.

It is an amenable number.

66976636 is a deficient number, since it is larger than the sum of its proper divisors (50294364).

66976636 is a wasteful number, since it uses less digits than its factorization.

66976636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8844 (or 8842 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 49.

The square root of 66976636 is about 8183.9254639812. The cubic root of 66976636 is about 406.1075936056.

The spelling of 66976636 in words is "sixty-six million, nine hundred seventy-six thousand, six hundred thirty-six".