678591275990 has 8 divisors (see below), whose sum is σ = 1221464296800. Its totient is φ = 271436510392.

The previous prime is 678591275981. The next prime is 678591276001. The reversal of 678591275990 is 99572195876.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×678591275990² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 678591275990.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33929563790 + ... + 33929563809.

It is an arithmetic number, because the mean of its divisors is an integer number (152683037100).

Almost surely, 2^678591275990 is an apocalyptic number.

678591275990 is a deficient number, since it is larger than the sum of its proper divisors (542873020810).

678591275990 is a wasteful number, since it uses less digits than its factorization.

678591275990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67859127606.

The product of its (nonzero) digits is 85730400, while the sum is 68.

The spelling of 678591275990 in words is "six hundred seventy-eight billion, five hundred ninety-one million, two hundred seventy-five thousand, nine hundred ninety".