66752939 has 8 divisors (see below), whose sum is σ = 73128960. Its totient is φ = 60428200.

The previous prime is 66752929. The next prime is 66752941. The reversal of 66752939 is 93925766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66752939 - 2⁸ = 66752683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66752893 and 66752902.

It is not an unprimeable number, because it can be changed into a prime (66752929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10067 + ... + 15324.

It is an arithmetic number, because the mean of its divisors is an integer number (9141120).

Almost surely, 2^66752939 is an apocalyptic number.

66752939 is a deficient number, since it is larger than the sum of its proper divisors (6376021).

66752939 is a wasteful number, since it uses less digits than its factorization.

66752939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25641.

The product of its digits is 612360, while the sum is 47.

The square root of 66752939 is about 8170.2471810833. The cubic root of 66752939 is about 405.6549662296.

The spelling of 66752939 in words is "sixty-six million, seven hundred fifty-two thousand, nine hundred thirty-nine".