47668665 has 32 divisors (see below), whose sum is σ = 83607552. Its totient is φ = 23000000.

The previous prime is 47668661. The next prime is 47668693. The reversal of 47668665 is 56686674.

It is not a de Polignac number, because 47668665 - 2² = 47668661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47668661) 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 31 ways as a sum of consecutive naturals, for example, 40840 + ... + 41990.

It is an arithmetic number, because the mean of its divisors is an integer number (2612736).

Almost surely, 2^47668665 is an apocalyptic number.

It is an amenable number.

47668665 is a deficient number, since it is larger than the sum of its proper divisors (35938887).

47668665 is a wasteful number, since it uses less digits than its factorization.

47668665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421.

The product of its digits is 1451520, while the sum is 48.

The square root of 47668665 is about 6904.2497782163. The cubic root of 47668665 is about 362.5859708897.

Subtracting 47668665 from its reverse (56686674), we obtain a square (9018009 = 3003²).

It can be divided in two parts, 4766 and 8665, that added together give a palindrome (13431).

The spelling of 47668665 in words is "forty-seven million, six hundred sixty-eight thousand, six hundred sixty-five".