661851083175 has 24 divisors (see below), whose sum is σ = 1094289879120. Its totient is φ = 352977753600.

The previous prime is 661851083161. The next prime is 661851083371. The reversal of 661851083175 is 571380158166.

It is not a de Polignac number, because 661851083175 - 2²¹ = 661848986023 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3368031 + ... + 3559119.

It is an arithmetic number, because the mean of its divisors is an integer number (45595411630).

Almost surely, 2^661851083175 is an apocalyptic number.

661851083175 is a deficient number, since it is larger than the sum of its proper divisors (432438795945).

661851083175 is a wasteful number, since it uses less digits than its factorization.

661851083175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237283 (or 237278 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 661851083175 in words is "six hundred sixty-one billion, eight hundred fifty-one million, eighty-three thousand, one hundred seventy-five".