91180066 has 8 divisors (see below), whose sum is σ = 138643884. Its totient is φ = 44965440.

The previous prime is 91180057. The next prime is 91180079. The reversal of 91180066 is 66008119.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 90801841 + 378225 = 9529^2 + 615^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312115 + ... + 312406.

Almost surely, 2^91180066 is an apocalyptic number.

91180066 is a deficient number, since it is larger than the sum of its proper divisors (47463818).

91180066 is a wasteful number, since it uses less digits than its factorization.

91180066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624596.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 91180066 is about 9548.8253727880. The cubic root of 91180066 is about 450.0906253692.

The spelling of 91180066 in words is "ninety-one million, one hundred eighty thousand, sixty-six".