139888066694 has 16 divisors (see below), whose sum is σ = 221508798000. Its totient is φ = 66072897504.

The previous prime is 139888066687. The next prime is 139888066699. The reversal of 139888066694 is 496660888931.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139888066699) 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, 5260757 + ... + 5287280.

It is an arithmetic number, because the mean of its divisors is an integer number (13844299875).

Almost surely, 2^139888066694 is an apocalyptic number.

139888066694 is a deficient number, since it is larger than the sum of its proper divisors (81620731306).

139888066694 is a wasteful number, since it uses less digits than its factorization.

139888066694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10548407.

The product of its (nonzero) digits is 107495424, while the sum is 68.

The spelling of 139888066694 in words is "one hundred thirty-nine billion, eight hundred eighty-eight million, sixty-six thousand, six hundred ninety-four".