66946626 has 24 divisors (see below), whose sum is σ = 145926144. Its totient is φ = 22180920.

The previous prime is 66946609. The next prime is 66946661. The reversal of 66946626 is 62664966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8130 + ... + 14141.

It is an arithmetic number, because the mean of its divisors is an integer number (6080256).

Almost surely, 2^66946626 is an apocalyptic number.

66946626 is an abundant number, since it is smaller than the sum of its proper divisors (78979518).

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

66946626 is a wasteful number, since it uses less digits than its factorization.

66946626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22446 (or 22443 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 66946626 is about 8182.0917863343. The cubic root of 66946626 is about 406.0469301150.

The spelling of 66946626 in words is "sixty-six million, nine hundred forty-six thousand, six hundred twenty-six".