866985393 has 8 divisors (see below), whose sum is σ = 1182863968. Its totient is φ = 564548544.

The previous prime is 866985389. The next prime is 866985407. The reversal of 866985393 is 393589668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 866985393 - 2² = 866985389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866983393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3360280 + ... + 3360537.

It is an arithmetic number, because the mean of its divisors is an integer number (147857996).

Almost surely, 2^866985393 is an apocalyptic number.

It is an amenable number.

866985393 is a deficient number, since it is larger than the sum of its proper divisors (315878575).

866985393 is a wasteful number, since it uses less digits than its factorization.

866985393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720863.

The product of its digits is 8398080, while the sum is 57.

The square root of 866985393 is about 29444.6156877620. The cubic root of 866985393 is about 953.5363645551.

The spelling of 866985393 in words is "eight hundred sixty-six million, nine hundred eighty-five thousand, three hundred ninety-three".