866361402 has 24 divisors (see below), whose sum is σ = 1937669760. Its totient is φ = 279471240.

The previous prime is 866361347. The next prime is 866361403. The reversal of 866361402 is 204163668.

866361402 is a `hidden beast` number, since 8 + 6 + 636 + 14 + 0 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (866361403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 775752 + ... + 776867.

It is an arithmetic number, because the mean of its divisors is an integer number (80736240).

Almost surely, 2^866361402 is an apocalyptic number.

866361402 is an abundant number, since it is smaller than the sum of its proper divisors (1071308358).

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

866361402 is a wasteful number, since it uses less digits than its factorization.

866361402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552658 (or 1552655 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 866361402 is about 29434.0177685616. The cubic root of 866361402 is about 953.3075483542.

The spelling of 866361402 in words is "eight hundred sixty-six million, three hundred sixty-one thousand, four hundred two".