421666713 has 12 divisors (see below), whose sum is σ = 655926180. Its totient is φ = 259487136.

The previous prime is 421666669. The next prime is 421666717. The reversal of 421666713 is 317666124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 170380809 + 251285904 = 13053^2 + 15852^2 .

It is not a de Polignac number, because 421666713 - 2⁸ = 421666457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421666717) 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, 1801878 + ... + 1802111.

It is an arithmetic number, because the mean of its divisors is an integer number (54660515).

Almost surely, 2^421666713 is an apocalyptic number.

It is an amenable number.

421666713 is a deficient number, since it is larger than the sum of its proper divisors (234259467).

421666713 is a wasteful number, since it uses less digits than its factorization.

421666713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604008 (or 3604005 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 421666713 is about 20534.5249031966. The cubic root of 421666713 is about 749.8765503480.

The spelling of 421666713 in words is "four hundred twenty-one million, six hundred sixty-six thousand, seven hundred thirteen".