665615130 has 16 divisors (see below), whose sum is σ = 1597476384. Its totient is φ = 177497360.

The previous prime is 665615123. The next prime is 665615179. The reversal of 665615130 is 31516566.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 665615091 and 665615100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11093556 + ... + 11093615.

It is an arithmetic number, because the mean of its divisors is an integer number (99842274).

Almost surely, 2^665615130 is an apocalyptic number.

665615130 is an abundant number, since it is smaller than the sum of its proper divisors (931861254).

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

665615130 is a wasteful number, since it uses less digits than its factorization.

665615130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22187181.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 665615130 is about 25799.5180187538. The cubic root of 665615130 is about 873.1209220936.

The spelling of 665615130 in words is "six hundred sixty-five million, six hundred fifteen thousand, one hundred thirty".