61606664 has 32 divisors (see below), whose sum is σ = 138964800. Its totient is φ = 25012800.

The previous prime is 61606663. The next prime is 61606697. The reversal of 61606664 is 46660616.

It is not an unprimeable number, because it can be changed into a prime (61606661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27887 + ... + 30014.

It is an arithmetic number, because the mean of its divisors is an integer number (4342650).

Almost surely, 2^61606664 is an apocalyptic number.

It is an amenable number.

61606664 is an abundant number, since it is smaller than the sum of its proper divisors (77358136).

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

61606664 is a wasteful number, since it uses less digits than its factorization.

61606664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57933 (or 57929 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 61606664 is about 7848.9912727687. The cubic root of 61606664 is about 394.9504055664.

The spelling of 61606664 in words is "sixty-one million, six hundred six thousand, six hundred sixty-four".