866781902 has 32 divisors (see below), whose sum is σ = 1528922304. Its totient is φ = 360806400.

The previous prime is 866781871. The next prime is 866781911. The reversal of 866781902 is 209187668.

866781902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130502 + ... + 136982.

It is an arithmetic number, because the mean of its divisors is an integer number (47778822).

Almost surely, 2^866781902 is an apocalyptic number.

866781902 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

866781902 is a deficient number, since it is larger than the sum of its proper divisors (662140402).

866781902 is a wasteful number, since it uses less digits than its factorization.

866781902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6764.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 866781902 is about 29441.1599975273. The cubic root of 866781902 is about 953.4617568963.

The spelling of 866781902 in words is "eight hundred sixty-six million, seven hundred eighty-one thousand, nine hundred two".