137906661 has 8 divisors (see below), whose sum is σ = 183996000. Its totient is φ = 91877552.

The previous prime is 137906653. The next prime is 137906677. The reversal of 137906661 is 166609731.

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

It is a cyclic number.

It is not a de Polignac number, because 137906661 - 2³ = 137906653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137906611) 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, 9411 + ... + 19088.

It is an arithmetic number, because the mean of its divisors is an integer number (22999500).

Almost surely, 2^137906661 is an apocalyptic number.

It is an amenable number.

137906661 is a deficient number, since it is larger than the sum of its proper divisors (46089339).

137906661 is a wasteful number, since it uses less digits than its factorization.

137906661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30115.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 137906661 is about 11743.3666808118. The cubic root of 137906661 is about 516.6483909364.

The spelling of 137906661 in words is "one hundred thirty-seven million, nine hundred six thousand, six hundred sixty-one".