47666664 has 64 divisors (see below), whose sum is σ = 134265600. Its totient is φ = 15666048.

The previous prime is 47666639. The next prime is 47666699. The reversal of 47666664 is 46666674.

It is a super-2 number, since 2×47666664² = 4544221713777792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14257 + ... + 17279.

It is an arithmetic number, because the mean of its divisors is an integer number (2097900).

Almost surely, 2^47666664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47666664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67132800).

47666664 is an abundant number, since it is smaller than the sum of its proper divisors (86598936).

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

47666664 is a wasteful number, since it uses less digits than its factorization.

47666664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111 (or 3101 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The square root of 47666664 is about 6904.1048659475. The cubic root of 47666664 is about 362.5808973633.

The spelling of 47666664 in words is "forty-seven million, six hundred sixty-six thousand, six hundred sixty-four".