66083840 has 44 divisors (see below), whose sum is σ = 158536056. Its totient is φ = 26431488.

The previous prime is 66083839. The next prime is 66083891. The reversal of 66083840 is 4838066.

It is a self number, because there is not a number n which added to its sum of digits gives 66083840.

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, 1334 + ... + 11573.

Almost surely, 2^66083840 is an apocalyptic number.

It is an amenable number.

66083840 is an abundant number, since it is smaller than the sum of its proper divisors (92452216).

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

66083840 is a wasteful number, since it uses less digits than its factorization.

66083840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12932 (or 12914 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 66083840 is about 8129.1967622884. The cubic root of 66083840 is about 404.2950496367.

The spelling of 66083840 in words is "sixty-six million, eighty-three thousand, eight hundred forty".