66756982 has 4 divisors (see below), whose sum is σ = 100135476. Its totient is φ = 33378490.

The previous prime is 66756961. The next prime is 66757001. The reversal of 66756982 is 28965766.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16689244 + ... + 16689247.

It is an arithmetic number, because the mean of its divisors is an integer number (25033869).

Almost surely, 2^66756982 is an apocalyptic number.

66756982 is a deficient number, since it is larger than the sum of its proper divisors (33378494).

66756982 is a wasteful number, since it uses less digits than its factorization.

66756982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33378493.

The product of its digits is 1088640, while the sum is 49.

The square root of 66756982 is about 8170.4945994719. The cubic root of 66756982 is about 405.6631557812.

The spelling of 66756982 in words is "sixty-six million, seven hundred fifty-six thousand, nine hundred eighty-two".