66668835 has 16 divisors (see below), whose sum is σ = 111308544. Its totient is φ = 34010592.

The previous prime is 66668827. The next prime is 66668843. The reversal of 66668835 is 53886666.

It is an interprime number because it is at equal distance from previous prime (66668827) and next prime (66668843).

It is not a de Polignac number, because 66668835 - 2³ = 66668827 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96277 + ... + 96966.

It is an arithmetic number, because the mean of its divisors is an integer number (6956784).

Almost surely, 2^66668835 is an apocalyptic number.

66668835 is a deficient number, since it is larger than the sum of its proper divisors (44639709).

66668835 is a wasteful number, since it uses less digits than its factorization.

66668835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193274.

The product of its digits is 1244160, while the sum is 48.

The square root of 66668835 is about 8165.0985909541. The cubic root of 66668835 is about 405.4845290710.

The spelling of 66668835 in words is "sixty-six million, six hundred sixty-eight thousand, eight hundred thirty-five".