68910666 has 32 divisors (see below), whose sum is σ = 150667776. Its totient is φ = 20838000.

The previous prime is 68910661. The next prime is 68910679. The reversal of 68910666 is 66601986.

It is not an unprimeable number, because it can be changed into a prime (68910661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44851 + ... + 46361.

It is an arithmetic number, because the mean of its divisors is an integer number (4708368).

Almost surely, 2^68910666 is an apocalyptic number.

68910666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

68910666 is an abundant number, since it is smaller than the sum of its proper divisors (81757110).

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

68910666 is a wasteful number, since it uses less digits than its factorization.

68910666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 68910666 is about 8301.2448464071. The cubic root of 68910666 is about 409.9795072050.

The spelling of 68910666 in words is "sixty-eight million, nine hundred ten thousand, six hundred sixty-six".