45566639 has 2 divisors, whose sum is σ = 45566640. Its totient is φ = 45566638.

The previous prime is 45566629. The next prime is 45566671. The reversal of 45566639 is 93666554.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45566639 - 2⁸ = 45566383 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45566639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45566629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22783319 + 22783320.

It is an arithmetic number, because the mean of its divisors is an integer number (22783320).

Almost surely, 2^45566639 is an apocalyptic number.

45566639 is a deficient number, since it is larger than the sum of its proper divisors (1).

45566639 is an equidigital number, since it uses as much as digits as its factorization.

45566639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 44.

The square root of 45566639 is about 6750.3065856300. The cubic root of 45566639 is about 357.1760515966.

The spelling of 45566639 in words is "forty-five million, five hundred sixty-six thousand, six hundred thirty-nine".