665510051 has 8 divisors (see below), whose sum is σ = 675337824. Its totient is φ = 655695040.

The previous prime is 665509993. The next prime is 665510057. The reversal of 665510051 is 150015566.

665510051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665510051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665509996 and 665510023.

It is not an unprimeable number, because it can be changed into a prime (665510057) 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, 167945 + ... + 171861.

It is an arithmetic number, because the mean of its divisors is an integer number (84417228).

Almost surely, 2^665510051 is an apocalyptic number.

665510051 is a deficient number, since it is larger than the sum of its proper divisors (9827773).

665510051 is a wasteful number, since it uses less digits than its factorization.

665510051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6381.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 665510051 is about 25797.4814856024. The cubic root of 665510051 is about 873.0749738684.

The spelling of 665510051 in words is "six hundred sixty-five million, five hundred ten thousand, fifty-one".