47666649 has 32 divisors (see below), whose sum is σ = 70686720. Its totient is φ = 28435968.

The previous prime is 47666639. The next prime is 47666699. The reversal of 47666649 is 94666674.

It is not a de Polignac number, because 47666649 - 2⁵ = 47666617 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 47666598 and 47666607.

It is not an unprimeable number, because it can be changed into a prime (47666609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134857 + ... + 135209.

It is an arithmetic number, because the mean of its divisors is an integer number (2208960).

Almost surely, 2^47666649 is an apocalyptic number.

It is an amenable number.

47666649 is a deficient number, since it is larger than the sum of its proper divisors (23020071).

47666649 is a wasteful number, since it uses less digits than its factorization.

47666649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its digits is 1306368, while the sum is 48.

The square root of 47666649 is about 6904.1037796372. The cubic root of 47666649 is about 362.5808593304.

The spelling of 47666649 in words is "forty-seven million, six hundred sixty-six thousand, six hundred forty-nine".