665125150556461 has 8 divisors (see below), whose sum is σ = 777820774073024. Its totient is φ = 556848963256320.

The previous prime is 665125150556459. The next prime is 665125150556519. The reversal of 665125150556461 is 164655051521566.

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

It is not a de Polignac number, because 665125150556461 - 2¹ = 665125150556459 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665125150556396 and 665125150556405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665125150556401) 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, 1104859053780 + ... + 1104859054381.

It is an arithmetic number, because the mean of its divisors is an integer number (97227596759128).

Almost surely, 2^{665125150556461} is an apocalyptic number.

It is an amenable number.

665125150556461 is a deficient number, since it is larger than the sum of its proper divisors (112695623516563).

665125150556461 is a wasteful number, since it uses less digits than its factorization.

665125150556461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209718108211.

The product of its (nonzero) digits is 32400000, while the sum is 58.

The spelling of 665125150556461 in words is "six hundred sixty-five trillion, one hundred twenty-five billion, one hundred fifty million, five hundred fifty-six thousand, four hundred sixty-one".