699611996878 has 4 divisors (see below), whose sum is σ = 1049417995320. Its totient is φ = 349805998438.

The previous prime is 699611996803. The next prime is 699611996891. The reversal of 699611996878 is 878699116996.

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

It is a junction number, because it is equal to n+sod(n) for n = 699611996798 and 699611996807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174902999218 + ... + 174902999221.

It is an arithmetic number, because the mean of its divisors is an integer number (262354498830).

Almost surely, 2^699611996878 is an apocalyptic number.

699611996878 is a deficient number, since it is larger than the sum of its proper divisors (349805998442).

699611996878 is a wasteful number, since it uses less digits than its factorization.

699611996878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349805998441.

The product of its digits is 634894848, while the sum is 79.

The spelling of 699611996878 in words is "six hundred ninety-nine billion, six hundred eleven million, nine hundred ninety-six thousand, eight hundred seventy-eight".