61916664 has 32 divisors (see below), whose sum is σ = 155359440. Its totient is φ = 20563200.

The previous prime is 61916639. The next prime is 61916707. The reversal of 61916664 is 46661916.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 2154 + ... + 11334.

Almost surely, 2^61916664 is an apocalyptic number.

It is an amenable number.

61916664 is an abundant number, since it is smaller than the sum of its proper divisors (93442776).

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

61916664 is a wasteful number, since it uses less digits than its factorization.

61916664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9471 (or 9467 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 61916664 is about 7868.7142532945. The cubic root of 61916664 is about 395.6117508896.

The spelling of 61916664 in words is "sixty-one million, nine hundred sixteen thousand, six hundred sixty-four".