187666661042 has 12 divisors (see below), whose sum is σ = 327459174030. Its totient is φ = 80428568976.

The previous prime is 187666660999. The next prime is 187666661057. The reversal of 187666661042 is 240166666781.

It can be written as a sum of positive squares in only one way, i.e., 137625418441 + 50041242601 = 370979^2 + 223699^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 957482867 + ... + 957483062.

Almost surely, 2^187666661042 is an apocalyptic number.

187666661042 is a deficient number, since it is larger than the sum of its proper divisors (139792512988).

187666661042 is a wasteful number, since it uses less digits than its factorization.

187666661042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914965945 (or 1914965938 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 187666661042 in words is "one hundred eighty-seven billion, six hundred sixty-six million, six hundred sixty-one thousand, forty-two".