403599966 has 48 divisors (see below), whose sum is σ = 1024358400. Its totient is φ = 104830320.

The previous prime is 403599949. The next prime is 403599967. The reversal of 403599966 is 669995304.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403599967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59166 + ... + 65633.

It is an arithmetic number, because the mean of its divisors is an integer number (21340800).

Almost surely, 2^403599966 is an apocalyptic number.

403599966 is an abundant number, since it is smaller than the sum of its proper divisors (620758434).

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

403599966 is a wasteful number, since it uses less digits than its factorization.

403599966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124829 (or 124822 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 51.

The square root of 403599966 is about 20089.7975599557. The cubic root of 403599966 is about 739.0100995774.

The spelling of 403599966 in words is "four hundred three million, five hundred ninety-nine thousand, nine hundred sixty-six".