66883715 has 16 divisors (see below), whose sum is σ = 83868480. Its totient is φ = 51139200.

The previous prime is 66883711. The next prime is 66883717. The reversal of 66883715 is 51738866.

66883715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66883715 - 2² = 66883711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66883711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12362 + ... + 16928.

It is an arithmetic number, because the mean of its divisors is an integer number (5241780).

Almost surely, 2^66883715 is an apocalyptic number.

66883715 is a deficient number, since it is larger than the sum of its proper divisors (16984765).

66883715 is a wasteful number, since it uses less digits than its factorization.

66883715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702.

The product of its digits is 241920, while the sum is 44.

The square root of 66883715 is about 8178.2464501872. The cubic root of 66883715 is about 405.9197002815.

The spelling of 66883715 in words is "sixty-six million, eight hundred eighty-three thousand, seven hundred fifteen".