69681668 has 24 divisors (see below), whose sum is σ = 140294784. Its totient is φ = 29664000.

The previous prime is 69681649. The next prime is 69681671. The reversal of 69681668 is 86618696.

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, 4013 + ... + 12468.

It is an arithmetic number, because the mean of its divisors is an integer number (5845616).

Almost surely, 2^69681668 is an apocalyptic number.

It is an amenable number.

69681668 is an abundant number, since it is smaller than the sum of its proper divisors (70613116).

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

69681668 is a wasteful number, since it uses less digits than its factorization.

69681668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16643 (or 16641 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The square root of 69681668 is about 8347.5546119807. The cubic root of 69681668 is about 411.5028486698.

The spelling of 69681668 in words is "sixty-nine million, six hundred eighty-one thousand, six hundred sixty-eight".