866645331542 has 8 divisors (see below), whose sum is σ = 1330199811336. Its totient is φ = 423245394432.

The previous prime is 866645331523. The next prime is 866645331581. The reversal of 866645331542 is 245133546668.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5038635563 + ... + 5038635734.

It is an arithmetic number, because the mean of its divisors is an integer number (166274976417).

Almost surely, 2^866645331542 is an apocalyptic number.

866645331542 is a deficient number, since it is larger than the sum of its proper divisors (463554479794).

866645331542 is a wasteful number, since it uses less digits than its factorization.

866645331542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077271342.

The product of its digits is 12441600, while the sum is 53.

The spelling of 866645331542 in words is "eight hundred sixty-six billion, six hundred forty-five million, three hundred thirty-one thousand, five hundred forty-two".