66975892 has 12 divisors (see below), whose sum is σ = 117546100. Its totient is φ = 33391296.

The previous prime is 66975871. The next prime is 66975907. The reversal of 66975892 is 29857966.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61528336 + 5447556 = 7844^2 + 2334^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 22593 + ... + 25384.

Almost surely, 2^66975892 is an apocalyptic number.

It is an amenable number.

66975892 is a deficient number, since it is larger than the sum of its proper divisors (50570208).

66975892 is a wasteful number, since it uses less digits than its factorization.

66975892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48330 (or 48328 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 52.

The square root of 66975892 is about 8183.8800088955. The cubic root of 66975892 is about 406.1060898714.

The spelling of 66975892 in words is "sixty-six million, nine hundred seventy-five thousand, eight hundred ninety-two".