137217666 has 16 divisors (see below), whose sum is σ = 274569984. Its totient is φ = 45716784.

The previous prime is 137217643. The next prime is 137217671. The reversal of 137217666 is 666712731.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11791 + ... + 20333.

It is an arithmetic number, because the mean of its divisors is an integer number (17160624).

Almost surely, 2^137217666 is an apocalyptic number.

137217666 is an abundant number, since it is smaller than the sum of its proper divisors (137352318).

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

137217666 is a wasteful number, since it uses less digits than its factorization.

137217666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11225.

The product of its digits is 63504, while the sum is 39.

The square root of 137217666 is about 11713.9944510829. The cubic root of 137217666 is about 515.7865456285.

The spelling of 137217666 in words is "one hundred thirty-seven million, two hundred seventeen thousand, six hundred sixty-six".