86173700661 has 8 divisors (see below), whose sum is σ = 127664741760. Its totient is φ = 57449133756.

The previous prime is 86173700633. The next prime is 86173700681. The reversal of 86173700661 is 16600737168.

It is not a de Polignac number, because 86173700661 - 2⁵ = 86173700629 is a prime.

It is a super-2 number, since 2×86173700661² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86173700611) 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, 1595809245 + ... + 1595809298.

It is an arithmetic number, because the mean of its divisors is an integer number (15958092720).

Almost surely, 2^86173700661 is an apocalyptic number.

It is an amenable number.

86173700661 is a deficient number, since it is larger than the sum of its proper divisors (41491041099).

86173700661 is a wasteful number, since it uses less digits than its factorization.

86173700661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191618552 (or 3191618546 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 86173700661 in words is "eighty-six billion, one hundred seventy-three million, seven hundred thousand, six hundred sixty-one".