66281836 has 12 divisors (see below), whose sum is σ = 116664912. Its totient is φ = 32949008.

The previous prime is 66281801. The next prime is 66281843. The reversal of 66281836 is 63818266.

It is a super-3 number, since 3×66281836³ (a number of 24 digits) contains 333 as substring.

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, 47200 + ... + 48583.

It is an arithmetic number, because the mean of its divisors is an integer number (9722076).

Almost surely, 2^66281836 is an apocalyptic number.

It is an amenable number.

66281836 is a deficient number, since it is larger than the sum of its proper divisors (50383076).

66281836 is a wasteful number, since it uses less digits than its factorization.

66281836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95960 (or 95958 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 66281836 is about 8141.3657330942. The cubic root of 66281836 is about 404.6984210198.

It can be divided in two parts, 6628 and 1836, that added together give a square (8464 = 92²).

The spelling of 66281836 in words is "sixty-six million, two hundred eighty-one thousand, eight hundred thirty-six".