66011986 has 16 divisors (see below), whose sum is σ = 105018336. Its totient is φ = 31012416.

The previous prime is 66011941. The next prime is 66012031. The reversal of 66011986 is 68911066.

It is an interprime number because it is at equal distance from previous prime (66011941) and next prime (66012031).

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, 25525 + ... + 27991.

It is an arithmetic number, because the mean of its divisors is an integer number (6563646).

Almost surely, 2^66011986 is an apocalyptic number.

66011986 is a deficient number, since it is larger than the sum of its proper divisors (39006350).

66011986 is a wasteful number, since it uses less digits than its factorization.

66011986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 66011986 is about 8124.7760584523. The cubic root of 66011986 is about 404.1484643708.

The spelling of 66011986 in words is "sixty-six million, eleven thousand, nine hundred eighty-six".