420652666 has 32 divisors (see below), whose sum is σ = 770434560. Its totient is φ = 168235056.

The previous prime is 420652663. The next prime is 420652693. The reversal of 420652666 is 666256024.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (420652663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6021 + ... + 29623.

It is an arithmetic number, because the mean of its divisors is an integer number (24076080).

Almost surely, 2^420652666 is an apocalyptic number.

420652666 is a deficient number, since it is larger than the sum of its proper divisors (349781894).

420652666 is a wasteful number, since it uses less digits than its factorization.

420652666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23698.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 420652666 is about 20509.8187705304. The cubic root of 420652666 is about 749.2749532280.

The spelling of 420652666 in words is "four hundred twenty million, six hundred fifty-two thousand, six hundred sixty-six".