66710842 has 16 divisors (see below), whose sum is σ = 109330272. Its totient is φ = 30276720.

The previous prime is 66710837. The next prime is 66710851. The reversal of 66710842 is 24801766.

It is a junction number, because it is equal to n+sod(n) for n = 66710798 and 66710807.

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, 15388 + ... + 19240.

It is an arithmetic number, because the mean of its divisors is an integer number (6833142).

Almost surely, 2^66710842 is an apocalyptic number.

66710842 is a deficient number, since it is larger than the sum of its proper divisors (42619430).

66710842 is a wasteful number, since it uses less digits than its factorization.

66710842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4653.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 66710842 is about 8167.6705369401. The cubic root of 66710842 is about 405.5696743637.

The spelling of 66710842 in words is "sixty-six million, seven hundred ten thousand, eight hundred forty-two".