420023666 has 8 divisors (see below), whose sum is σ = 630319980. Its totient is φ = 209917008.

The previous prime is 420023623. The next prime is 420023683. The reversal of 420023666 is 666320024.

It can be written as a sum of positive squares in 2 ways, for example, as 314530225 + 105493441 = 17735^2 + 10271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41741 + ... + 50816.

Almost surely, 2^420023666 is an apocalyptic number.

420023666 is a deficient number, since it is larger than the sum of its proper divisors (210296314).

420023666 is a wasteful number, since it uses less digits than its factorization.

420023666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94828.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 420023666 is about 20494.4789150639. The cubic root of 420023666 is about 748.9013044619.

The spelling of 420023666 in words is "four hundred twenty million, twenty-three thousand, six hundred sixty-six".