66886965 has 24 divisors (see below), whose sum is σ = 120233568. Its totient is φ = 35672400.

The previous prime is 66886909. The next prime is 66886979. The reversal of 66886965 is 56968866.

It is not a de Polignac number, because 66886965 - 2⁹ = 66886453 is a prime.

It is a super-2 number, since 2×66886965² = 8947732173822450, which contains 22 as substring.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 26311 + ... + 28740.

It is an arithmetic number, because the mean of its divisors is an integer number (5009732).

Almost surely, 2^66886965 is an apocalyptic number.

It is an amenable number.

66886965 is a deficient number, since it is larger than the sum of its proper divisors (53346603).

66886965 is an equidigital number, since it uses as much as digits as its factorization.

66886965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55071 (or 55059 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 66886965 is about 8178.4451456252. The cubic root of 66886965 is about 405.9262749644.

The spelling of 66886965 in words is "sixty-six million, eight hundred eighty-six thousand, nine hundred sixty-five".