66420234 has 12 divisors (see below), whose sum is σ = 143910546. Its totient is φ = 22140072.

The previous prime is 66420229. The next prime is 66420239. The reversal of 66420234 is 43202466.

66420234 is a `hidden beast` number, since 6 + 6 + 420 + 234 = 666.

It is an interprime number because it is at equal distance from previous prime (66420229) and next prime (66420239).

It can be written as a sum of positive squares in only one way, i.e., 65853225 + 567009 = 8115^2 + 753^2 .

It is a super-2 number, since 2×66420234² = 8823294969229512, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66420198 and 66420207.

It is not an unprimeable number, because it can be changed into a prime (66420239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1844989 + ... + 1845024.

Almost surely, 2^66420234 is an apocalyptic number.

66420234 is an abundant number, since it is smaller than the sum of its proper divisors (77490312).

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

66420234 is a wasteful number, since it uses less digits than its factorization.

66420234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690021 (or 3690018 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 66420234 is about 8149.8609804094. The cubic root of 66420234 is about 404.9798984079.

The spelling of 66420234 in words is "sixty-six million, four hundred twenty thousand, two hundred thirty-four".