678566337955 has 8 divisors (see below), whose sum is σ = 888305024304. Its totient is φ = 493502791200.

The previous prime is 678566337949. The next prime is 678566337959. The reversal of 678566337955 is 559733665876.

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

It is not a de Polignac number, because 678566337955 - 2²¹ = 678564240803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678566337959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6168784836 + ... + 6168784945.

It is an arithmetic number, because the mean of its divisors is an integer number (111038128038).

Almost surely, 2^678566337955 is an apocalyptic number.

678566337955 is a deficient number, since it is larger than the sum of its proper divisors (209738686349).

678566337955 is a wasteful number, since it uses less digits than its factorization.

678566337955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12337569797.

The product of its digits is 857304000, while the sum is 70.

The spelling of 678566337955 in words is "six hundred seventy-eight billion, five hundred sixty-six million, three hundred thirty-seven thousand, nine hundred fifty-five".