8266491917901 has 48 divisors (see below), whose sum is σ = 13660884357120. Its totient is φ = 4718653742880.

The previous prime is 8266491917891. The next prime is 8266491917911. The reversal of 8266491917901 is 1097191946628.

8266491917901 is a `hidden beast` number, since 82 + 66 + 491 + 9 + 1 + 7 + 9 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (8266491917891) and next prime (8266491917911).

It is not a de Polignac number, because 8266491917901 - 2⁵ = 8266491917869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8266491917911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 361618210 + ... + 361641068.

It is an arithmetic number, because the mean of its divisors is an integer number (284601757440).

Almost surely, 2^{8266491917901} is an apocalyptic number.

It is an amenable number.

8266491917901 is a deficient number, since it is larger than the sum of its proper divisors (5394392439219).

8266491917901 is a wasteful number, since it uses less digits than its factorization.

8266491917901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28766 (or 28763 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 63.

The spelling of 8266491917901 in words is "eight trillion, two hundred sixty-six billion, four hundred ninety-one million, nine hundred seventeen thousand, nine hundred one".