91666750925 has 12 divisors (see below), whose sum is σ = 113686741440. Its totient is φ = 73320516720.

The previous prime is 91666750921. The next prime is 91666750927. The reversal of 91666750925 is 52905766619.

It is not a de Polignac number, because 91666750925 - 2² = 91666750921 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91666750921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175655 + ... + 462804.

It is an arithmetic number, because the mean of its divisors is an integer number (9473895120).

Almost surely, 2^91666750925 is an apocalyptic number.

It is an amenable number.

91666750925 is a deficient number, since it is larger than the sum of its proper divisors (22019990515).

91666750925 is a wasteful number, since it uses less digits than its factorization.

91666750925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644212 (or 644207 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 56.

The spelling of 91666750925 in words is "ninety-one billion, six hundred sixty-six million, seven hundred fifty thousand, nine hundred twenty-five".