66895706 has 16 divisors (see below), whose sum is σ = 103783680. Its totient is φ = 32305440.

The previous prime is 66895687. The next prime is 66895733. The reversal of 66895706 is 60759866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52505 + ... + 53763.

It is an arithmetic number, because the mean of its divisors is an integer number (6486480).

Almost surely, 2^66895706 is an apocalyptic number.

66895706 is a deficient number, since it is larger than the sum of its proper divisors (36887974).

66895706 is a wasteful number, since it uses less digits than its factorization.

66895706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 66895706 is about 8178.9795206982. The cubic root of 66895706 is about 405.9439567704.

The spelling of 66895706 in words is "sixty-six million, eight hundred ninety-five thousand, seven hundred six".