91663077 has 8 divisors (see below), whose sum is σ = 133328160. Its totient is φ = 55553360.

The previous prime is 91663051. The next prime is 91663079. The reversal of 91663077 is 77036619.

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

It is a cyclic number.

It is not a de Polignac number, because 91663077 - 2¹¹ = 91661029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91663079) 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, 1388802 + ... + 1388867.

It is an arithmetic number, because the mean of its divisors is an integer number (16666020).

Almost surely, 2^91663077 is an apocalyptic number.

It is an amenable number.

91663077 is a deficient number, since it is larger than the sum of its proper divisors (41665083).

91663077 is a wasteful number, since it uses less digits than its factorization.

91663077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2777683.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 91663077 is about 9574.0836115004. The cubic root of 91663077 is about 450.8839858066.

The spelling of 91663077 in words is "ninety-one million, six hundred sixty-three thousand, seventy-seven".