66870706 has 16 divisors (see below), whose sum is σ = 119620224. Its totient is φ = 27412704.

The previous prime is 66870697. The next prime is 66870731. The reversal of 66870706 is 60707866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103515 + ... + 104158.

It is an arithmetic number, because the mean of its divisors is an integer number (7476264).

Almost surely, 2^66870706 is an apocalyptic number.

66870706 is a deficient number, since it is larger than the sum of its proper divisors (52749518).

66870706 is a wasteful number, since it uses less digits than its factorization.

66870706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207705.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 66870706 is about 8177.4510698628. The cubic root of 66870706 is about 405.8933812102.

It can be divided in two parts, 66870 and 706, that added together give a palindrome (67576).

The spelling of 66870706 in words is "sixty-six million, eight hundred seventy thousand, seven hundred six".