66970166 has 4 divisors (see below), whose sum is σ = 100455252. Its totient is φ = 33485082.

The previous prime is 66970153. The next prime is 66970187. The reversal of 66970166 is 66107966.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 16742540 + ... + 16742543.

It is an arithmetic number, because the mean of its divisors is an integer number (25113813).

Almost surely, 2^66970166 is an apocalyptic number.

66970166 is a deficient number, since it is larger than the sum of its proper divisors (33485086).

66970166 is a wasteful number, since it uses less digits than its factorization.

66970166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33485085.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 66970166 is about 8183.5301673544. The cubic root of 66970166 is about 406.0945164049.

The spelling of 66970166 in words is "sixty-six million, nine hundred seventy thousand, one hundred sixty-six".