66994875 has 96 divisors (see below), whose sum is σ = 133166592. Its totient is φ = 32256000.

The previous prime is 66994871. The next prime is 66994877. The reversal of 66994875 is 57849966.

It is not a de Polignac number, because 66994875 - 2² = 66994871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66994871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 592819 + ... + 592931.

It is an arithmetic number, because the mean of its divisors is an integer number (1387152).

Almost surely, 2^66994875 is an apocalyptic number.

66994875 is a deficient number, since it is larger than the sum of its proper divisors (66171717).

66994875 is a wasteful number, since it uses less digits than its factorization.

66994875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 169 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 66994875 is about 8185.0397066844. The cubic root of 66994875 is about 406.1444538432.

The spelling of 66994875 in words is "sixty-six million, nine hundred ninety-four thousand, eight hundred seventy-five".