6407660397599 has 4 divisors (see below), whose sum is σ = 6407702286960. Its totient is φ = 6407618508240.

The previous prime is 6407660397571. The next prime is 6407660397629. The reversal of 6407660397599 is 9957930667046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6407660397599 - 2¹² = 6407660393503 is a prime.

It is a super-2 number, since 2×6407660397599² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6407660393599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20714387 + ... + 21021444.

It is an arithmetic number, because the mean of its divisors is an integer number (1601925571740).

Almost surely, 2^{6407660397599} is an apocalyptic number.

6407660397599 is a deficient number, since it is larger than the sum of its proper divisors (41889361).

6407660397599 is a wasteful number, since it uses less digits than its factorization.

6407660397599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41889360.

The product of its (nonzero) digits is 462944160, while the sum is 71.

The spelling of 6407660397599 in words is "six trillion, four hundred seven billion, six hundred sixty million, three hundred ninety-seven thousand, five hundred ninety-nine".