68666380 has 24 divisors (see below), whose sum is σ = 151789680. Its totient is φ = 26020800.

The previous prime is 68666359. The next prime is 68666441. The reversal of 68666380 is 8366686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89971 + ... + 90730.

It is an arithmetic number, because the mean of its divisors is an integer number (6324570).

Almost surely, 2^68666380 is an apocalyptic number.

It is an amenable number.

68666380 is an abundant number, since it is smaller than the sum of its proper divisors (83123300).

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

68666380 is a wasteful number, since it uses less digits than its factorization.

68666380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180729 (or 180727 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 68666380 is about 8286.5179659493. The cubic root of 68666380 is about 409.4944790818.

The spelling of 68666380 in words is "sixty-eight million, six hundred sixty-six thousand, three hundred eighty".