420135666644 has 24 divisors (see below), whose sum is σ = 735723189600. Its totient is φ = 209929099680.

The previous prime is 420135666581. The next prime is 420135666647. The reversal of 420135666644 is 446666531024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420135666647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67640699 + ... + 67646909.

It is an arithmetic number, because the mean of its divisors is an integer number (30655132900).

Almost surely, 2^420135666644 is an apocalyptic number.

It is an amenable number.

420135666644 is a deficient number, since it is larger than the sum of its proper divisors (315587522956).

420135666644 is a wasteful number, since it uses less digits than its factorization.

420135666644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14663 (or 14661 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 420135666644 in words is "four hundred twenty billion, one hundred thirty-five million, six hundred sixty-six thousand, six hundred forty-four".