666565106 has 16 divisors (see below), whose sum is σ = 1055614560. Its totient is φ = 314798400.

The previous prime is 666565103. The next prime is 666565127. The reversal of 666565106 is 601565666.

It is not an unprimeable number, because it can be changed into a prime (666565103) 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, 13220 + ... + 38831.

It is an arithmetic number, because the mean of its divisors is an integer number (65975910).

Almost surely, 2^666565106 is an apocalyptic number.

666565106 is a deficient number, since it is larger than the sum of its proper divisors (389049454).

666565106 is a wasteful number, since it uses less digits than its factorization.

666565106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52409.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 666565106 is about 25817.9221859545. The cubic root of 666565106 is about 873.5361017763.

The spelling of 666565106 in words is "six hundred sixty-six million, five hundred sixty-five thousand, one hundred six".