61568668 has 12 divisors (see below), whose sum is σ = 123137392. Its totient is φ = 26386560.

The previous prime is 61568657. The next prime is 61568671. The reversal of 61568668 is 86686516.

61568668 is an admirable number.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099413 + ... + 1099468.

Almost surely, 2^61568668 is an apocalyptic number.

It is an amenable number.

61568668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61568668 is a wasteful number, since it uses less digits than its factorization.

61568668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198892 (or 2198890 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 61568668 is about 7846.5704610358. The cubic root of 61568668 is about 394.8691934550.

The spelling of 61568668 in words is "sixty-one million, five hundred sixty-eight thousand, six hundred sixty-eight".