866905672 has 16 divisors (see below), whose sum is σ = 1628766000. Its totient is φ = 432568080.

The previous prime is 866905649. The next prime is 866905751. The reversal of 866905672 is 276509668.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106422 + ... + 114277.

It is an arithmetic number, because the mean of its divisors is an integer number (101797875).

Almost surely, 2^866905672 is an apocalyptic number.

It is an amenable number.

866905672 is a deficient number, since it is larger than the sum of its proper divisors (761860328).

866905672 is a wasteful number, since it uses less digits than its factorization.

866905672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221196 (or 221192 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 866905672 is about 29443.2619116836. The cubic root of 866905672 is about 953.5071371490.

The spelling of 866905672 in words is "eight hundred sixty-six million, nine hundred five thousand, six hundred seventy-two".