666340803 has 32 divisors (see below), whose sum is σ = 998676480. Its totient is φ = 439084800.

The previous prime is 666340793. The next prime is 666340819. The reversal of 666340803 is 308043666.

It is not a de Polignac number, because 666340803 - 2¹⁴ = 666324419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666340303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1438950 + ... + 1439412.

It is an arithmetic number, because the mean of its divisors is an integer number (31208640).

Almost surely, 2^666340803 is an apocalyptic number.

666340803 is a deficient number, since it is larger than the sum of its proper divisors (332335677).

666340803 is a wasteful number, since it uses less digits than its factorization.

666340803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 666340803 is about 25813.5778806426. The cubic root of 666340803 is about 873.4381074726.

The spelling of 666340803 in words is "six hundred sixty-six million, three hundred forty thousand, eight hundred three".