662665261625 has 8 divisors (see below), whose sum is σ = 827006246664. Its totient is φ = 530132209200.

The previous prime is 662665261567. The next prime is 662665261649. The reversal of 662665261625 is 526162566266.

It can be written as a sum of positive squares in 4 ways, for example, as 1951518976 + 660713742649 = 44176^2 + 812843^2 .

It is not a de Polignac number, because 662665261625 - 2³⁸ = 387787354681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2650660922 + ... + 2650661171.

It is an arithmetic number, because the mean of its divisors is an integer number (103375780833).

Almost surely, 2^662665261625 is an apocalyptic number.

It is an amenable number.

662665261625 is a deficient number, since it is larger than the sum of its proper divisors (164340985039).

662665261625 is an equidigital number, since it uses as much as digits as its factorization.

662665261625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5301322108 (or 5301322098 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 53.

The spelling of 662665261625 in words is "six hundred sixty-two billion, six hundred sixty-five million, two hundred sixty-one thousand, six hundred twenty-five".