66668874 has 16 divisors (see below), whose sum is σ = 133433760. Its totient is φ = 22206960.

The previous prime is 66668873. The next prime is 66668887. The reversal of 66668874 is 47886666.

It is not an unprimeable number, because it can be changed into a prime (66668873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7629 + ... + 13839.

It is an arithmetic number, because the mean of its divisors is an integer number (8339610).

Almost surely, 2^66668874 is an apocalyptic number.

66668874 is an abundant number, since it is smaller than the sum of its proper divisors (66764886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66668874 is a wasteful number, since it uses less digits than its factorization.

66668874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8005.

The product of its digits is 2322432, while the sum is 51.

The square root of 66668874 is about 8165.1009791674. The cubic root of 66668874 is about 405.4846081379.

The spelling of 66668874 in words is "sixty-six million, six hundred sixty-eight thousand, eight hundred seventy-four".