91766466719 has 4 divisors (see below), whose sum is σ = 93136115544. Its totient is φ = 90396817896.

The previous prime is 91766466697. The next prime is 91766466739.

91766466719 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91766466719 is a prime.

It is a super-2 number, since 2×91766466719² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91766466739) 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, 684824312 + ... + 684824445.

It is an arithmetic number, because the mean of its divisors is an integer number (23284028886).

Almost surely, 2^91766466719 is an apocalyptic number.

91766466719 is a deficient number, since it is larger than the sum of its proper divisors (1369648825).

91766466719 is a wasteful number, since it uses less digits than its factorization.

91766466719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369648824.

The product of its digits is 20575296, while the sum is 62.

The spelling of 91766466719 in words is "ninety-one billion, seven hundred sixty-six million, four hundred sixty-six thousand, seven hundred nineteen".