665516010 has 16 divisors (see below), whose sum is σ = 1597238496. Its totient is φ = 177470928.

The previous prime is 665516009. The next prime is 665516011. The reversal of 665516010 is 10615566.

It is an interprime number because it is at equal distance from previous prime (665516009) and next prime (665516011).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 22183867 = 665516010 / (6 + 6 + 5 + 5 + 1 + 6 + 0 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (665516011) 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, 11091904 + ... + 11091963.

It is an arithmetic number, because the mean of its divisors is an integer number (99827406).

Almost surely, 2^665516010 is an apocalyptic number.

665516010 is an abundant number, since it is smaller than the sum of its proper divisors (931722486).

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

665516010 is a wasteful number, since it uses less digits than its factorization.

665516010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22183877.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 665516010 is about 25797.5969811143. The cubic root of 665516010 is about 873.0775797084.

The spelling of 665516010 in words is "six hundred sixty-five million, five hundred sixteen thousand, ten".