91665967711 has 8 divisors (see below), whose sum is σ = 95819562720. Its totient is φ = 87526382592.

The previous prime is 91665967697. The next prime is 91665967717. The reversal of 91665967711 is 11776956619.

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

It is a cyclic number.

It is not a de Polignac number, because 91665967711 - 2⁷ = 91665967583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91665967717) 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, 3489090 + ... + 3515263.

It is an arithmetic number, because the mean of its divisors is an integer number (11977445340).

Almost surely, 2^91665967711 is an apocalyptic number.

91665967711 is a deficient number, since it is larger than the sum of its proper divisors (4153595009).

91665967711 is a wasteful number, since it uses less digits than its factorization.

91665967711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7004945.

The product of its digits is 4286520, while the sum is 58.

The spelling of 91665967711 in words is "ninety-one billion, six hundred sixty-five million, nine hundred sixty-seven thousand, seven hundred eleven".