91667592685 has 8 divisors (see below), whose sum is σ = 112974114456. Its totient is φ = 71352072000.

The previous prime is 91667592677. The next prime is 91667592721. The reversal of 91667592685 is 58629576619.

It can be written as a sum of positive squares in 4 ways, for example, as 42899937129 + 48767655556 = 207123^2 + 220834^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91667592685 - 2³ = 91667592677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247750066 + ... + 247750435.

It is an arithmetic number, because the mean of its divisors is an integer number (14121764307).

Almost surely, 2^91667592685 is an apocalyptic number.

It is an amenable number.

91667592685 is a deficient number, since it is larger than the sum of its proper divisors (21306521771).

91667592685 is a wasteful number, since it uses less digits than its factorization.

91667592685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495500543.

The product of its digits is 48988800, while the sum is 64.

The spelling of 91667592685 in words is "ninety-one billion, six hundred sixty-seven million, five hundred ninety-two thousand, six hundred eighty-five".