665870977214 has 8 divisors (see below), whose sum is σ = 1051375227240. Its totient is φ = 315412568136.

The previous prime is 665870977193. The next prime is 665870977223. The reversal of 665870977214 is 412779078566.

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, 8761460189 + ... + 8761460264.

It is an arithmetic number, because the mean of its divisors is an integer number (131421903405).

Almost surely, 2^665870977214 is an apocalyptic number.

665870977214 is a deficient number, since it is larger than the sum of its proper divisors (385504250026).

665870977214 is a wasteful number, since it uses less digits than its factorization.

665870977214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17522920474.

The product of its (nonzero) digits is 35562240, while the sum is 62.

The spelling of 665870977214 in words is "six hundred sixty-five billion, eight hundred seventy million, nine hundred seventy-seven thousand, two hundred fourteen".