91646666333 has 4 divisors (see below), whose sum is σ = 91749989280. Its totient is φ = 91543343388.

The previous prime is 91646666329. The next prime is 91646666339. The reversal of 91646666333 is 33366664619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91646666333 - 2² = 91646666329 is a prime.

It is a super-2 number, since 2×91646666333² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91646666339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51660143 + ... + 51661916.

It is an arithmetic number, because the mean of its divisors is an integer number (22937497320).

Almost surely, 2^91646666333 is an apocalyptic number.

It is an amenable number.

91646666333 is a deficient number, since it is larger than the sum of its proper divisors (103322947).

91646666333 is a wasteful number, since it uses less digits than its factorization.

91646666333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103322946.

The product of its digits is 7558272, while the sum is 53.

The spelling of 91646666333 in words is "ninety-one billion, six hundred forty-six million, six hundred sixty-six thousand, three hundred thirty-three".