863649501066 has 64 divisors (see below), whose sum is σ = 2094330608640. Its totient is φ = 261632614320.

The previous prime is 863649501049. The next prime is 863649501163. The reversal of 863649501066 is 660105946368.

863649501066 is a `hidden beast` number, since 8 + 6 + 36 + 49 + 501 + 0 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1755091 + ... + 2192633.

It is an arithmetic number, because the mean of its divisors is an integer number (32723915760).

Almost surely, 2^863649501066 is an apocalyptic number.

863649501066 is an abundant number, since it is smaller than the sum of its proper divisors (1230681107574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

863649501066 is a wasteful number, since it uses less digits than its factorization.

863649501066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440888 (or 440882 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 863649501066 in words is "eight hundred sixty-three billion, six hundred forty-nine million, five hundred one thousand, sixty-six".