66240336 has 20 divisors (see below), whose sum is σ = 171120992. Its totient is φ = 22080096.

The previous prime is 66240283. The next prime is 66240353. The reversal of 66240336 is 63304266.

It is a super-2 number, since 2×66240336² = 8775564226785792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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, 689956 + ... + 690051.

Almost surely, 2^66240336 is an apocalyptic number.

It is an amenable number.

66240336 is an abundant number, since it is smaller than the sum of its proper divisors (104880656).

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

66240336 is a wasteful number, since it uses less digits than its factorization.

66240336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380018 (or 1380012 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 66240336 is about 8138.8166215980. The cubic root of 66240336 is about 404.6139409073.

The spelling of 66240336 in words is "sixty-six million, two hundred forty thousand, three hundred thirty-six".