91106866 has 4 divisors (see below), whose sum is σ = 136660302. Its totient is φ = 45553432.

The previous prime is 91106849. The next prime is 91106909. The reversal of 91106866 is 66860119.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66860119 = 5527 ⋅12097.

It can be written as a sum of positive squares in only one way, i.e., 62173225 + 28933641 = 7885^2 + 5379^2 .

It is a super-2 number, since 2×91106866² = 16600922064683912, 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, 22776715 + ... + 22776718.

Almost surely, 2^91106866 is an apocalyptic number.

91106866 is a deficient number, since it is larger than the sum of its proper divisors (45553436).

91106866 is a wasteful number, since it uses less digits than its factorization.

91106866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45553435.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 91106866 is about 9544.9916710283. The cubic root of 91106866 is about 449.9701478139.

The spelling of 91106866 in words is "ninety-one million, one hundred six thousand, eight hundred sixty-six".