646599087 has 12 divisors (see below), whose sum is σ = 959219560. Its totient is φ = 419415408.

The previous prime is 646599067. The next prime is 646599103. The reversal of 646599087 is 780995646.

646599087 is a `hidden beast` number, since 6 + 46 + 599 + 0 + 8 + 7 = 666.

646599087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646599087 - 2¹⁹ = 646074799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646599007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 970537 + ... + 971202.

Almost surely, 2^646599087 is an apocalyptic number.

646599087 is a deficient number, since it is larger than the sum of its proper divisors (312620473).

646599087 is a wasteful number, since it uses less digits than its factorization.

646599087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941782 (or 1941779 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 646599087 is about 25428.3127045425. The cubic root of 646599087 is about 864.7256915855.

The spelling of 646599087 in words is "six hundred forty-six million, five hundred ninety-nine thousand, eighty-seven".