678027687081 has 8 divisors (see below), whose sum is σ = 957215558304. Its totient is φ = 425429136960.

The previous prime is 678027687061. The next prime is 678027687109. The reversal of 678027687081 is 180786720876.

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

It is not a de Polignac number, because 678027687081 - 2¹⁰ = 678027686057 is a prime.

It is a super-2 number, since 2×678027687081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (678027687061) 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 7 ways as a sum of consecutive naturals, for example, 6647330215 + ... + 6647330316.

It is an arithmetic number, because the mean of its divisors is an integer number (119651944788).

Almost surely, 2^678027687081 is an apocalyptic number.

It is an amenable number.

678027687081 is a deficient number, since it is larger than the sum of its proper divisors (279187871223).

678027687081 is a wasteful number, since it uses less digits than its factorization.

678027687081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13294660551.

The product of its (nonzero) digits is 12644352, while the sum is 60.

The spelling of 678027687081 in words is "six hundred seventy-eight billion, twenty-seven million, six hundred eighty-seven thousand, eighty-one".