68677664 has 36 divisors (see below), whose sum is σ = 148626702. Its totient is φ = 31215360.

The previous prime is 68677639. The next prime is 68677673. The reversal of 68677664 is 46677686.

It can be written as a sum of positive squares in only one way, i.e., 46512400 + 22165264 = 6820^2 + 4708^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4997 + ... + 12740.

Almost surely, 2^68677664 is an apocalyptic number.

It is an amenable number.

68677664 is an abundant number, since it is smaller than the sum of its proper divisors (79949038).

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

68677664 is a wasteful number, since it uses less digits than its factorization.

68677664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17769 (or 17750 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 50.

The square root of 68677664 is about 8287.1988029732. The cubic root of 68677664 is about 409.5169087027.

The spelling of 68677664 in words is "sixty-eight million, six hundred seventy-seven thousand, six hundred sixty-four".