66143670 has 16 divisors (see below), whose sum is σ = 158744880. Its totient is φ = 17638304.

The previous prime is 66143669. The next prime is 66143681. The reversal of 66143670 is 7634166.

It is a Curzon number.

It is a congruent number.

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, 1102365 + ... + 1102424.

It is an arithmetic number, because the mean of its divisors is an integer number (9921555).

Almost surely, 2^66143670 is an apocalyptic number.

66143670 is an abundant number, since it is smaller than the sum of its proper divisors (92601210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66143670 is a wasteful number, since it uses less digits than its factorization.

66143670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204799.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 66143670 is about 8132.8758751133. The cubic root of 66143670 is about 404.4170243713.

The spelling of 66143670 in words is "sixty-six million, one hundred forty-three thousand, six hundred seventy".