91267719666 has 16 divisors (see below), whose sum is σ = 182538789600. Its totient is φ = 30422014848.

The previous prime is 91267719637. The next prime is 91267719679. The reversal of 91267719666 is 66691776219.

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, 342765 + ... + 547743.

It is an arithmetic number, because the mean of its divisors is an integer number (11408674350).

Almost surely, 2^91267719666 is an apocalyptic number.

91267719666 is an abundant number, since it is smaller than the sum of its proper divisors (91271069934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91267719666 is a wasteful number, since it uses less digits than its factorization.

91267719666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279193.

The product of its digits is 10287648, while the sum is 60.

The spelling of 91267719666 in words is "ninety-one billion, two hundred sixty-seven million, seven hundred nineteen thousand, six hundred sixty-six".