61660233198 has 12 divisors (see below), whose sum is σ = 133597171968. Its totient is φ = 20553411060.

The previous prime is 61660233161. The next prime is 61660233203. The reversal of 61660233198 is 89133206616.

61660233198 is a `hidden beast` number, since 6 + 1 + 6 + 602 + 3 + 31 + 9 + 8 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1712784238 + ... + 1712784273.

It is an arithmetic number, because the mean of its divisors is an integer number (11133097664).

Almost surely, 2^61660233198 is an apocalyptic number.

61660233198 is an abundant number, since it is smaller than the sum of its proper divisors (71936938770).

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

61660233198 is a wasteful number, since it uses less digits than its factorization.

61660233198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425568519 (or 3425568516 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 61660233198 in words is "sixty-one billion, six hundred sixty million, two hundred thirty-three thousand, one hundred ninety-eight".