47668664 has 8 divisors (see below), whose sum is σ = 89378760. Its totient is φ = 23834328.

The previous prime is 47668661. The next prime is 47668693. The reversal of 47668664 is 46686674.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47668661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2979284 + ... + 2979299.

It is an arithmetic number, because the mean of its divisors is an integer number (11172345).

Almost surely, 2^47668664 is an apocalyptic number.

It is an amenable number.

47668664 is a deficient number, since it is larger than the sum of its proper divisors (41710096).

47668664 is a wasteful number, since it uses less digits than its factorization.

47668664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5958589 (or 5958585 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The square root of 47668664 is about 6904.2497057971. The cubic root of 47668664 is about 362.5859683542.

The spelling of 47668664 in words is "forty-seven million, six hundred sixty-eight thousand, six hundred sixty-four".