84866118718491 has 36 divisors (see below), whose sum is σ = 141833182833160. Its totient is φ = 48726958104000.

The previous prime is 84866118718363. The next prime is 84866118718499. The reversal of 84866118718491 is 19481781166848.

84866118718491 is a `hidden beast` number, since 8 + 4 + 8 + 6 + 6 + 118 + 7 + 18 + 491 = 666.

It is not a de Polignac number, because 84866118718491 - 2⁷ = 84866118718363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84866118718499) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2050777210 + ... + 2050818591.

Almost surely, 2^{84866118718491} is an apocalyptic number.

84866118718491 is a deficient number, since it is larger than the sum of its proper divisors (56967064114669).

84866118718491 is a wasteful number, since it uses less digits than its factorization.

84866118718491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101595848 (or 4101595834 counting only the distinct ones).

The product of its digits is 148635648, while the sum is 72.

The spelling of 84866118718491 in words is "eighty-four trillion, eight hundred sixty-six billion, one hundred eighteen million, seven hundred eighteen thousand, four hundred ninety-one".