47666709 has 12 divisors (see below), whose sum is σ = 69626700. Its totient is φ = 31420224.

The previous prime is 47666699. The next prime is 47666713. The reversal of 47666709 is 90766674.

It can be written as a sum of positive squares in 2 ways, for example, as 5130225 + 42536484 = 2265^2 + 6522^2 .

It is not a de Polignac number, because 47666709 - 2¹² = 47662613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47666719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28954 + ... + 30555.

It is an arithmetic number, because the mean of its divisors is an integer number (5802225).

Almost surely, 2^47666709 is an apocalyptic number.

It is an amenable number.

47666709 is a deficient number, since it is larger than the sum of its proper divisors (21959991).

47666709 is a wasteful number, since it uses less digits than its factorization.

47666709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59604 (or 59601 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The square root of 47666709 is about 6904.1081248775. The cubic root of 47666709 is about 362.5810114622.

The spelling of 47666709 in words is "forty-seven million, six hundred sixty-six thousand, seven hundred nine".