66683742 has 16 divisors (see below), whose sum is σ = 135056640. Its totient is φ = 21946392.

The previous prime is 66683737. The next prime is 66683761. The reversal of 66683742 is 24738666.

It is a junction number, because it is equal to n+sod(n) for n = 66683694 and 66683703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69868 + ... + 70815.

It is an arithmetic number, because the mean of its divisors is an integer number (8441040).

Almost surely, 2^66683742 is an apocalyptic number.

66683742 is an abundant number, since it is smaller than the sum of its proper divisors (68372898).

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

66683742 is a wasteful number, since it uses less digits than its factorization.

66683742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140767.

The product of its digits is 290304, while the sum is 42.

The square root of 66683742 is about 8166.0113886768. The cubic root of 66683742 is about 405.5147486252.

The spelling of 66683742 in words is "sixty-six million, six hundred eighty-three thousand, seven hundred forty-two".