666006490 has 16 divisors (see below), whose sum is σ = 1199175840. Its totient is φ = 266321680.

The previous prime is 666006443. The next prime is 666006499. The reversal of 666006490 is 94600666.

It is not an unprimeable number, because it can be changed into a prime (666006499) 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, 33345 + ... + 49435.

It is an arithmetic number, because the mean of its divisors is an integer number (74948490).

Almost surely, 2^666006490 is an apocalyptic number.

666006490 is a deficient number, since it is larger than the sum of its proper divisors (533169350).

666006490 is a wasteful number, since it uses less digits than its factorization.

666006490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20237.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 666006490 is about 25807.1015420175. The cubic root of 666006490 is about 873.2920107804.

The spelling of 666006490 in words is "six hundred sixty-six million, six thousand, four hundred ninety".