320216666737 has 4 divisors (see below), whose sum is σ = 349327272816. Its totient is φ = 291106060660.

The previous prime is 320216666719. The next prime is 320216666773. The reversal of 320216666737 is 737666612023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320216666737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320216666717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14555303023 + ... + 14555303044.

It is an arithmetic number, because the mean of its divisors is an integer number (87331818204).

Almost surely, 2^320216666737 is an apocalyptic number.

It is an amenable number.

320216666737 is a deficient number, since it is larger than the sum of its proper divisors (29110606079).

320216666737 is a wasteful number, since it uses less digits than its factorization.

320216666737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29110606078.

The product of its (nonzero) digits is 2286144, while the sum is 49.

The spelling of 320216666737 in words is "three hundred twenty billion, two hundred sixteen million, six hundred sixty-six thousand, seven hundred thirty-seven".