66934240 has 24 divisors (see below), whose sum is σ = 158132520. Its totient is φ = 26773632.

The previous prime is 66934237. The next prime is 66934267. The reversal of 66934240 is 4243966.

66934240 = 991² + 992² + ... + 1054².

It is a junction number, because it is equal to n+sod(n) for n = 66934196 and 66934205.

It is a congruent number.

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, 209010 + ... + 209329.

It is an arithmetic number, because the mean of its divisors is an integer number (6588855).

Almost surely, 2^66934240 is an apocalyptic number.

It is an amenable number.

66934240 is an abundant number, since it is smaller than the sum of its proper divisors (91198280).

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

66934240 is a wasteful number, since it uses less digits than its factorization.

66934240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418354 (or 418346 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 66934240 is about 8181.3348544110. The cubic root of 66934240 is about 406.0218872425.

The spelling of 66934240 in words is "sixty-six million, nine hundred thirty-four thousand, two hundred forty".