68289666 has 16 divisors (see below), whose sum is σ = 136940544. Its totient is φ = 22703024.

The previous prime is 68289659. The next prime is 68289677. The reversal of 68289666 is 66698286.

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, 12561 + ... + 17156.

It is an arithmetic number, because the mean of its divisors is an integer number (8558784).

Almost surely, 2^68289666 is an apocalyptic number.

68289666 is an abundant number, since it is smaller than the sum of its proper divisors (68650878).

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

68289666 is a wasteful number, since it uses less digits than its factorization.

68289666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30105.

The product of its digits is 1492992, while the sum is 51.

The square root of 68289666 is about 8263.7561677484. The cubic root of 68289666 is about 408.7442562015.

The spelling of 68289666 in words is "sixty-eight million, two hundred eighty-nine thousand, six hundred sixty-six".