66932885 has 4 divisors (see below), whose sum is σ = 80319468. Its totient is φ = 53546304.

The previous prime is 66932881. The next prime is 66932891. The reversal of 66932885 is 58823966.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7612081 + 59320804 = 2759^2 + 7702^2 .

It is a cyclic number.

It is not a de Polignac number, because 66932885 - 2² = 66932881 is a prime.

It is a super-2 number, since 2×66932885² = 8960022188846450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66932881) 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, 6693284 + ... + 6693293.

It is an arithmetic number, because the mean of its divisors is an integer number (20079867).

Almost surely, 2^66932885 is an apocalyptic number.

It is an amenable number.

66932885 is a deficient number, since it is larger than the sum of its proper divisors (13386583).

66932885 is a wasteful number, since it uses less digits than its factorization.

66932885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13386582.

The product of its digits is 622080, while the sum is 47.

The square root of 66932885 is about 8181.2520435444. The cubic root of 66932885 is about 406.0191474222.

The spelling of 66932885 in words is "sixty-six million, nine hundred thirty-two thousand, eight hundred eighty-five".