666363616 has 48 divisors (see below), whose sum is σ = 1335954816. Its totient is φ = 327131136.

The previous prime is 666363601. The next prime is 666363619. The reversal of 666363616 is 616363666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666363619) 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, 424465 + ... + 426031.

It is an arithmetic number, because the mean of its divisors is an integer number (27832392).

Almost surely, 2^666363616 is an apocalyptic number.

It is an amenable number.

666363616 is an abundant number, since it is smaller than the sum of its proper divisors (669591200).

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

666363616 is a wasteful number, since it uses less digits than its factorization.

666363616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1803 counting only the distinct ones).

The product of its digits is 419904, while the sum is 43.

The square root of 666363616 is about 25814.0197567136. The cubic root of 666363616 is about 873.4480751028.

The spelling of 666363616 in words is "six hundred sixty-six million, three hundred sixty-three thousand, six hundred sixteen".