91661476 has 9 divisors (see below), whose sum is σ = 160441099. Its totient is φ = 45821164.

The previous prime is 91661461. The next prime is 91661483. The reversal of 91661476 is 67416619.

The square root of 91661476 is 9574.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

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 2 ways as a sum of consecutive naturals, for example, 16755 + ... + 21541.

Almost surely, 2^91661476 is an apocalyptic number.

91661476 is the 9574-th square number.

It is an amenable number.

91661476 is a deficient number, since it is larger than the sum of its proper divisors (68779623).

91661476 is an frugal number, since it uses more digits than its factorization.

91661476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9578 (or 4789 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The cubic root of 91661476 is about 450.8813607239.

The spelling of 91661476 in words is "ninety-one million, six hundred sixty-one thousand, four hundred seventy-six".