137760661 has 16 divisors (see below), whose sum is σ = 143434368. Its totient is φ = 132249600.

The previous prime is 137760647. The next prime is 137760671. The reversal of 137760661 is 166067731.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137760661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137760661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137760671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571501 + ... + 571741.

It is an arithmetic number, because the mean of its divisors is an integer number (8964648).

Almost surely, 2^137760661 is an apocalyptic number.

It is an amenable number.

137760661 is a deficient number, since it is larger than the sum of its proper divisors (5673707).

137760661 is an equidigital number, since it uses as much as digits as its factorization.

137760661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 137760661 is about 11737.1487593879. The cubic root of 137760661 is about 516.4660035657.

The spelling of 137760661 in words is "one hundred thirty-seven million, seven hundred sixty thousand, six hundred sixty-one".