665225714064 has 20 divisors (see below), whose sum is σ = 1718499761456. Its totient is φ = 221741904672.

The previous prime is 665225714057. The next prime is 665225714081. The reversal of 665225714064 is 460417522566.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 13858869043 = 665225714064 / (6 + 6 + 5 + 2 + 2 + 5 + 7 + 1 + 4 + 0 + 6 + 4).

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, 6929434474 + ... + 6929434569.

Almost surely, 2^665225714064 is an apocalyptic number.

It is an amenable number.

665225714064 is an abundant number, since it is smaller than the sum of its proper divisors (1053274047392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665225714064 is a wasteful number, since it uses less digits than its factorization.

665225714064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13858869054 (or 13858869048 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 665225714064 in words is "six hundred sixty-five billion, two hundred twenty-five million, seven hundred fourteen thousand, sixty-four".