91072116766 has 8 divisors (see below), whose sum is σ = 136611174024. Its totient is φ = 45535058760.

The previous prime is 91072116731. The next prime is 91072116787. The reversal of 91072116766 is 66761127019.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380205 + ... + 571576.

It is an arithmetic number, because the mean of its divisors is an integer number (17076396753).

Almost surely, 2^91072116766 is an apocalyptic number.

91072116766 is a deficient number, since it is larger than the sum of its proper divisors (45539057258).

91072116766 is a wasteful number, since it uses less digits than its factorization.

91072116766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999626.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 91072116766 in words is "ninety-one billion, seventy-two million, one hundred sixteen thousand, seven hundred sixty-six".