665245251627 has 8 divisors (see below), whose sum is σ = 967629456960. Its totient is φ = 403178940360.

The previous prime is 665245251623. The next prime is 665245251647. The reversal of 665245251627 is 726152542566.

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

It is not a de Polignac number, because 665245251627 - 2² = 665245251623 is a prime.

It is a super-2 number, since 2×665245251627² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 665245251627.

It is not an unprimeable number, because it can be changed into a prime (665245251623) 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, 10079473477 + ... + 10079473542.

It is an arithmetic number, because the mean of its divisors is an integer number (120953682120).

Almost surely, 2^665245251627 is an apocalyptic number.

665245251627 is a deficient number, since it is larger than the sum of its proper divisors (302384205333).

665245251627 is a wasteful number, since it uses less digits than its factorization.

665245251627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20158947033.

The product of its digits is 6048000, while the sum is 51.

The spelling of 665245251627 in words is "six hundred sixty-five billion, two hundred forty-five million, two hundred fifty-one thousand, six hundred twenty-seven".