139027681566 has 24 divisors (see below), whose sum is σ = 307635722784. Its totient is φ = 45356548320.

The previous prime is 139027681493. The next prime is 139027681579. The reversal of 139027681566 is 665186720931.

139027681566 is a `hidden beast` number, since 1 + 3 + 9 + 0 + 2 + 76 + 8 + 1 + 566 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82166815 + ... + 82168506.

It is an arithmetic number, because the mean of its divisors is an integer number (12818155116).

Almost surely, 2^139027681566 is an apocalyptic number.

139027681566 is an abundant number, since it is smaller than the sum of its proper divisors (168608041218).

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

139027681566 is a wasteful number, since it uses less digits than its factorization.

139027681566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164335376 (or 164335373 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 139027681566 in words is "one hundred thirty-nine billion, twenty-seven million, six hundred eighty-one thousand, five hundred sixty-six".