66201986 has 8 divisors (see below), whose sum is σ = 99603984. Its totient is φ = 33000660.

The previous prime is 66201979. The next prime is 66202001. The reversal of 66201986 is 68910266.

It is a sphenic number, since it is the product of 3 distinct primes.

66201986 is a modest number, since divided by 1986 gives 662 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49340 + ... + 50663.

It is an arithmetic number, because the mean of its divisors is an integer number (12450498).

Almost surely, 2^66201986 is an apocalyptic number.

66201986 is a deficient number, since it is larger than the sum of its proper divisors (33401998).

66201986 is a wasteful number, since it uses less digits than its factorization.

66201986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100336.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 66201986 is about 8136.4602868815. The cubic root of 66201986 is about 404.5358417658.

The spelling of 66201986 in words is "sixty-six million, two hundred one thousand, nine hundred eighty-six".