91323666 has 32 divisors (see below), whose sum is σ = 231934080. Its totient is φ = 26092368.

The previous prime is 91323653. The next prime is 91323691. The reversal of 91323666 is 66632319.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 91323666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120421 + ... + 121176.

It is an arithmetic number, because the mean of its divisors is an integer number (7247940).

Almost surely, 2^91323666 is an apocalyptic number.

91323666 is an abundant number, since it is smaller than the sum of its proper divisors (140610414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91323666 is a wasteful number, since it uses less digits than its factorization.

91323666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241615 (or 241609 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 91323666 is about 9556.3416640470. The cubic root of 91323666 is about 450.3267848574.

The spelling of 91323666 in words is "ninety-one million, three hundred twenty-three thousand, six hundred sixty-six".