47406665 has 4 divisors (see below), whose sum is σ = 56888004. Its totient is φ = 37925328.

The previous prime is 47406649. The next prime is 47406679. The reversal of 47406665 is 56660474.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15912121 + 31494544 = 3989^2 + 5612^2 .

It is a cyclic number.

It is not a de Polignac number, because 47406665 - 2⁴ = 47406649 is a prime.

It is a Duffinian 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, 4740662 + ... + 4740671.

It is an arithmetic number, because the mean of its divisors is an integer number (14222001).

Almost surely, 2^47406665 is an apocalyptic number.

It is an amenable number.

47406665 is a deficient number, since it is larger than the sum of its proper divisors (9481339).

47406665 is an equidigital number, since it uses as much as digits as its factorization.

47406665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9481338.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 47406665 is about 6885.2498139138. The cubic root of 47406665 is about 361.9204596159.

The spelling of 47406665 in words is "forty-seven million, four hundred six thousand, six hundred sixty-five".