866751564 has 48 divisors (see below), whose sum is σ = 2314142208. Its totient is φ = 247342848.

The previous prime is 866751563. The next prime is 866751569. The reversal of 866751564 is 465157668.

It is not an unprimeable number, because it can be changed into a prime (866751563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68692 + ... + 80324.

It is an arithmetic number, because the mean of its divisors is an integer number (48211296).

Almost surely, 2^866751564 is an apocalyptic number.

866751564 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

866751564 is an abundant number, since it is smaller than the sum of its proper divisors (1447390644).

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

866751564 is a wasteful number, since it uses less digits than its factorization.

866751564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12534 (or 12532 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 48.

The square root of 866751564 is about 29440.6447619613. The cubic root of 866751564 is about 953.4506328138.

The spelling of 866751564 in words is "eight hundred sixty-six million, seven hundred fifty-one thousand, five hundred sixty-four".