866861600 has 72 divisors (see below), whose sum is σ = 2308633488. Its totient is φ = 315219200.

The previous prime is 866861563. The next prime is 866861617. The reversal of 866861600 is 6168668.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40454 + ... + 58053.

It is an arithmetic number, because the mean of its divisors is an integer number (32064354).

Almost surely, 2^866861600 is an apocalyptic number.

866861600 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866861600 is an abundant number, since it is smaller than the sum of its proper divisors (1441771888).

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

866861600 is a wasteful number, since it uses less digits than its factorization.

866861600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98538 (or 98525 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 866861600 is about 29442.5134796607. The cubic root of 866861600 is about 953.4909786518.

It can be divided in two parts, 86 and 6861600, that added together give a palindrome (6861686).

The spelling of 866861600 in words is "eight hundred sixty-six million, eight hundred sixty-one thousand, six hundred".