664421202 has 24 divisors (see below), whose sum is σ = 1486018560. Its totient is φ = 214329240.

The previous prime is 664421179. The next prime is 664421207. The reversal of 664421202 is 202124466.

664421202 is a `hidden beast` number, since 6 + 644 + 2 + 12 + 0 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (664421207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 594802 + ... + 595917.

It is an arithmetic number, because the mean of its divisors is an integer number (61917440).

Almost surely, 2^664421202 is an apocalyptic number.

664421202 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

664421202 is an abundant number, since it is smaller than the sum of its proper divisors (821597358).

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

664421202 is a wasteful number, since it uses less digits than its factorization.

664421202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190758 (or 1190755 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 664421202 is about 25776.3690616037. The cubic root of 664421202 is about 872.5985644651.

Adding to 664421202 its reverse (202124466), we get a palindrome (866545668).

The spelling of 664421202 in words is "six hundred sixty-four million, four hundred twenty-one thousand, two hundred two".