420129966 has 8 divisors (see below), whose sum is σ = 840259944. Its totient is φ = 140043320.

The previous prime is 420129953. The next prime is 420129967. The reversal of 420129966 is 669921024.

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

420129966 is an admirable number.

It is a super-2 number, since 2×420129966² = 353018376662322312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420129967) 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, 35010825 + ... + 35010836.

It is an arithmetic number, because the mean of its divisors is an integer number (105032493).

Almost surely, 2^420129966 is an apocalyptic number.

420129966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

420129966 is a wasteful number, since it uses less digits than its factorization.

420129966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70021666.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 420129966 is about 20497.0721323803. The cubic root of 420129966 is about 748.9644766911.

The spelling of 420129966 in words is "four hundred twenty million, one hundred twenty-nine thousand, nine hundred sixty-six".