91907697966 has 32 divisors (see below), whose sum is σ = 210321097728. Its totient is φ = 26228547360.

The previous prime is 91907697961. The next prime is 91907697971. The reversal of 91907697966 is 66979670919.

It is an interprime number because it is at equal distance from previous prime (91907697961) and next prime (91907697971).

It is a self number, because there is not a number n which added to its sum of digits gives 91907697966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91907697961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1246870 + ... + 1318521.

It is an arithmetic number, because the mean of its divisors is an integer number (6572534304).

Almost surely, 2^91907697966 is an apocalyptic number.

91907697966 is an abundant number, since it is smaller than the sum of its proper divisors (118413399762).

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

91907697966 is a wasteful number, since it uses less digits than its factorization.

91907697966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566256.

The product of its (nonzero) digits is 69441624, while the sum is 69.

The spelling of 91907697966 in words is "ninety-one billion, nine hundred seven million, six hundred ninety-seven thousand, nine hundred sixty-six".