662044639 has 2 divisors, whose sum is σ = 662044640. Its totient is φ = 662044638.

The previous prime is 662044637. The next prime is 662044657. The reversal of 662044639 is 936440266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 662044639 - 2¹ = 662044637 is a prime.

Together with 662044637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662044637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331022319 + 331022320.

It is an arithmetic number, because the mean of its divisors is an integer number (331022320).

Almost surely, 2^662044639 is an apocalyptic number.

662044639 is a deficient number, since it is larger than the sum of its proper divisors (1).

662044639 is an equidigital number, since it uses as much as digits as its factorization.

662044639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 40.

The square root of 662044639 is about 25730.2281179161. The cubic root of 662044639 is about 871.5569245384.

The spelling of 662044639 in words is "six hundred sixty-two million, forty-four thousand, six hundred thirty-nine".