91966555 has 12 divisors (see below), whose sum is σ = 116476272. Its totient is φ = 69699600.

The previous prime is 91966529. The next prime is 91966559. The reversal of 91966555 is 55566919.

It is a happy number.

It is not a de Polignac number, because 91966555 - 2¹⁷ = 91835483 is a prime.

It is a super-3 number, since 3×91966555³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91966559) 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, 23671 + ... + 27280.

It is an arithmetic number, because the mean of its divisors is an integer number (9706356).

Almost surely, 2^91966555 is an apocalyptic number.

91966555 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

91966555 is a deficient number, since it is larger than the sum of its proper divisors (24509717).

91966555 is a wasteful number, since it uses less digits than its factorization.

91966555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50994 (or 50975 counting only the distinct ones).

The product of its digits is 364500, while the sum is 46.

The square root of 91966555 is about 9589.9194470027. The cubic root of 91966555 is about 451.3810330460.

It can be divided in two parts, 9196 and 6555, that added together give a palindrome (15751).

The spelling of 91966555 in words is "ninety-one million, nine hundred sixty-six thousand, five hundred fifty-five".