137668339666 has 64 divisors (see below), whose sum is σ = 245299332096. Its totient is φ = 57122856000.

The previous prime is 137668339649. The next prime is 137668339687. The reversal of 137668339666 is 666933866731.

It is a junction number, because it is equal to n+sod(n) for n = 137668339598 and 137668339607.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24358941 + ... + 24364591.

It is an arithmetic number, because the mean of its divisors is an integer number (3832802064).

Almost surely, 2^137668339666 is an apocalyptic number.

137668339666 is a deficient number, since it is larger than the sum of its proper divisors (107630992430).

137668339666 is a wasteful number, since it uses less digits than its factorization.

137668339666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6607.

The product of its digits is 105815808, while the sum is 64.

The spelling of 137668339666 in words is "one hundred thirty-seven billion, six hundred sixty-eight million, three hundred thirty-nine thousand, six hundred sixty-six".