91966155 has 8 divisors (see below), whose sum is σ = 147145872. Its totient is φ = 49048608.

The previous prime is 91966151. The next prime is 91966177. The reversal of 91966155 is 55166919.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91966155 - 2² = 91966151 is a prime.

It is a super-3 number, since 3×91966155³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91966151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3065524 + ... + 3065553.

It is an arithmetic number, because the mean of its divisors is an integer number (18393234).

Almost surely, 2^91966155 is an apocalyptic number.

91966155 is a deficient number, since it is larger than the sum of its proper divisors (55179717).

91966155 is a wasteful number, since it uses less digits than its factorization.

91966155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6131085.

The product of its digits is 72900, while the sum is 42.

The square root of 91966155 is about 9589.8985917475. The cubic root of 91966155 is about 451.3803786318.

It can be divided in two parts, 9196 and 6155, that added together give a palindrome (15351).

The spelling of 91966155 in words is "ninety-one million, nine hundred sixty-six thousand, one hundred fifty-five".