866516445 has 24 divisors (see below), whose sum is σ = 1504347936. Its totient is φ = 461407968.

The previous prime is 866516429. The next prime is 866516459. The reversal of 866516445 is 544615668.

It is not a de Polignac number, because 866516445 - 2⁴ = 866516429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 866516445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13962 + ... + 43908.

It is an arithmetic number, because the mean of its divisors is an integer number (62681164).

Almost surely, 2^866516445 is an apocalyptic number.

It is an amenable number.

866516445 is a deficient number, since it is larger than the sum of its proper divisors (637831491).

866516445 is a wasteful number, since it uses less digits than its factorization.

866516445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30601 (or 30598 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 866516445 is about 29436.6513890422. The cubic root of 866516445 is about 953.3644125550.

It can be divided in two parts, 86651 and 6445, that added together give a triangular number (93096 = T₄₃₁).

The spelling of 866516445 in words is "eight hundred sixty-six million, five hundred sixteen thousand, four hundred forty-five".