420600664 has 16 divisors (see below), whose sum is σ = 860319720. Its totient is φ = 191182080.

The previous prime is 420600647. The next prime is 420600667. The reversal of 420600664 is 466006024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420600667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2389689 + ... + 2389864.

Almost surely, 2^420600664 is an apocalyptic number.

420600664 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

420600664 is an abundant number, since it is smaller than the sum of its proper divisors (439719056).

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

420600664 is a wasteful number, since it uses less digits than its factorization.

420600664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4779570 (or 4779566 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 420600664 is about 20508.5509970841. The cubic root of 420600664 is about 749.2440762877.

Adding to 420600664 its reverse (466006024), we get a palindrome (886606688).

The spelling of 420600664 in words is "four hundred twenty million, six hundred thousand, six hundred sixty-four".