699620665842 has 48 divisors (see below), whose sum is σ = 1732444301952. Its totient is φ = 199885818240.

The previous prime is 699620665829. The next prime is 699620665859. The reversal of 699620665842 is 248566026996.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 699620665842.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6236467 + ... + 6347657.

It is an arithmetic number, because the mean of its divisors is an integer number (36092589624).

Almost surely, 2^699620665842 is an apocalyptic number.

699620665842 is an abundant number, since it is smaller than the sum of its proper divisors (1032823636110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

699620665842 is a wasteful number, since it uses less digits than its factorization.

699620665842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161143 (or 161140 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 699620665842 in words is "six hundred ninety-nine billion, six hundred twenty million, six hundred sixty-five thousand, eight hundred forty-two".