91748066 has 4 divisors (see below), whose sum is σ = 137622102. Its totient is φ = 45874032.

The previous prime is 91748047. The next prime is 91748159. The reversal of 91748066 is 66084719.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66084719 = 2797 ⋅23627.

It can be written as a sum of positive squares in only one way, i.e., 72607441 + 19140625 = 8521^2 + 4375^2 .

It is a super-2 number, since 2×91748066² = 16835415229480712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22937015 + ... + 22937018.

Almost surely, 2^91748066 is an apocalyptic number.

91748066 is a deficient number, since it is larger than the sum of its proper divisors (45874036).

91748066 is a wasteful number, since it uses less digits than its factorization.

91748066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45874035.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 91748066 is about 9578.5210758238. The cubic root of 91748066 is about 451.0232943231.

The spelling of 91748066 in words is "ninety-one million, seven hundred forty-eight thousand, sixty-six".