47666591 has 8 divisors (see below), whose sum is σ = 55222944. Its totient is φ = 40296960.

The previous prime is 47666587. The next prime is 47666609. The reversal of 47666591 is 19566674.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47666591 - 2² = 47666587 is a prime.

It is a super-2 number, since 2×47666591² = 4544207795122562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47666501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46130 + ... + 47151.

It is an arithmetic number, because the mean of its divisors is an integer number (6902868).

Almost surely, 2^47666591 is an apocalyptic number.

47666591 is a deficient number, since it is larger than the sum of its proper divisors (7556353).

47666591 is an equidigital number, since it uses as much as digits as its factorization.

47666591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93361.

The product of its digits is 272160, while the sum is 44.

The square root of 47666591 is about 6904.0995792355. The cubic root of 47666591 is about 362.5807122695.

The spelling of 47666591 in words is "forty-seven million, six hundred sixty-six thousand, five hundred ninety-one".