866376945 has 128 divisors (see below), whose sum is σ = 1838592000. Its totient is φ = 378846720.

The previous prime is 866376923. The next prime is 866376971. The reversal of 866376945 is 549673668.

It is not a de Polignac number, because 866376945 - 2⁸ = 866376689 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 866376891 and 866376900.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2285766 + ... + 2286144.

It is an arithmetic number, because the mean of its divisors is an integer number (14364000).

Almost surely, 2^866376945 is an apocalyptic number.

It is an amenable number.

866376945 is an abundant number, since it is smaller than the sum of its proper divisors (972215055).

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

866376945 is a wasteful number, since it uses less digits than its factorization.

866376945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500 (or 494 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The square root of 866376945 is about 29434.2817986103. The cubic root of 866376945 is about 953.3132492740.

The spelling of 866376945 in words is "eight hundred sixty-six million, three hundred seventy-six thousand, nine hundred forty-five".