91866055667351 has 6 divisors (see below), whose sum is σ = 106864595368200. Its totient is φ = 78742333429116.

The previous prime is 91866055667339. The next prime is 91866055667357. The reversal of 91866055667351 is 15376655066819.

It is a de Polignac number, because none of the positive numbers 2^k-91866055667351 is a prime.

It is a super-3 number, since 3×91866055667351³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91866055667357) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 937408731251 + ... + 937408731348.

It is an arithmetic number, because the mean of its divisors is an integer number (17810765894700).

Almost surely, 2^{91866055667351} is an apocalyptic number.

91866055667351 is a deficient number, since it is larger than the sum of its proper divisors (14998539700849).

91866055667351 is a wasteful number, since it uses less digits than its factorization.

91866055667351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874817462613 (or 1874817462606 counting only the distinct ones).

The product of its (nonzero) digits is 244944000, while the sum is 68.

The spelling of 91866055667351 in words is "ninety-one trillion, eight hundred sixty-six billion, fifty-five million, six hundred sixty-seven thousand, three hundred fifty-one".