61668464 has 40 divisors (see below), whose sum is σ = 140376432. Its totient is φ = 25873920.

The previous prime is 61668461. The next prime is 61668473. The reversal of 61668464 is 46486616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61668461) 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, 11189 + ... + 15764.

Almost surely, 2^61668464 is an apocalyptic number.

It is an amenable number.

61668464 is an abundant number, since it is smaller than the sum of its proper divisors (78707968).

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

61668464 is a wasteful number, since it uses less digits than its factorization.

61668464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26985 (or 26979 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 61668464 is about 7852.9270975860. The cubic root of 61668464 is about 395.0824247156.

The spelling of 61668464 in words is "sixty-one million, six hundred sixty-eight thousand, four hundred sixty-four".