61456664 has 8 divisors (see below), whose sum is σ = 115231260. Its totient is φ = 30728328.

The previous prime is 61456657. The next prime is 61456673. The reversal of 61456664 is 46665416.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3841034 + ... + 3841049.

Almost surely, 2^61456664 is an apocalyptic number.

It is an amenable number.

61456664 is a deficient number, since it is larger than the sum of its proper divisors (53774596).

61456664 is a wasteful number, since it uses less digits than its factorization.

61456664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7682089 (or 7682085 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 61456664 is about 7839.4300813261. The cubic root of 61456664 is about 394.6296031108.

The spelling of 61456664 in words is "sixty-one million, four hundred fifty-six thousand, six hundred sixty-four".