64664742 has 8 divisors (see below), whose sum is σ = 129329496. Its totient is φ = 21554912.

The previous prime is 64664737. The next prime is 64664773. The reversal of 64664742 is 24746646.

It is a sphenic number, since it is the product of 3 distinct primes.

64664742 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 64664742.

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, 5388723 + ... + 5388734.

It is an arithmetic number, because the mean of its divisors is an integer number (16166187).

Almost surely, 2^64664742 is an apocalyptic number.

64664742 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.

64664742 is a wasteful number, since it uses less digits than its factorization.

64664742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10777462.

The product of its digits is 193536, while the sum is 39.

The square root of 64664742 is about 8041.4390503193. The cubic root of 64664742 is about 401.3801119179.

The spelling of 64664742 in words is "sixty-four million, six hundred sixty-four thousand, seven hundred forty-two".