91066277 has 4 divisors (see below), whose sum is σ = 91086636. Its totient is φ = 91045920.

The previous prime is 91066273. The next prime is 91066301. The reversal of 91066277 is 77266019.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7873636 + 83192641 = 2806^2 + 9121^2 .

It is a cyclic number.

It is not a de Polignac number, because 91066277 - 2² = 91066273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91066277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91066273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224 + ... + 13497.

It is an arithmetic number, because the mean of its divisors is an integer number (22771659).

Almost surely, 2^91066277 is an apocalyptic number.

It is an amenable number.

91066277 is a deficient number, since it is larger than the sum of its proper divisors (20359).

91066277 is a wasteful number, since it uses less digits than its factorization.

91066277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20358.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 91066277 is about 9542.8652405868. The cubic root of 91066277 is about 449.9033158541.

The spelling of 91066277 in words is "ninety-one million, sixty-six thousand, two hundred seventy-seven".