91966475 has 6 divisors (see below), whose sum is σ = 114038460. Its totient is φ = 73573160.

The previous prime is 91966471. The next prime is 91966487. The reversal of 91966475 is 57466919.

It is not a de Polignac number, because 91966475 - 2² = 91966471 is a prime.

It is a super-3 number, since 3×91966475³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91966471) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1839305 + ... + 1839354.

It is an arithmetic number, because the mean of its divisors is an integer number (19006410).

Almost surely, 2^91966475 is an apocalyptic number.

91966475 is a deficient number, since it is larger than the sum of its proper divisors (22071985).

91966475 is a wasteful number, since it uses less digits than its factorization.

91966475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678669 (or 3678664 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 91966475 is about 9589.9152759553. The cubic root of 91966475 is about 451.3809021633.

It can be divided in two parts, 9 and 1966475, that multiplied together give a triangular number (17698275 = T₅₉₄₉).

The spelling of 91966475 in words is "ninety-one million, nine hundred sixty-six thousand, four hundred seventy-five".