66261682 has 16 divisors (see below), whose sum is σ = 105525720. Its totient is φ = 31097088.

The previous prime is 66261653. The next prime is 66261719. The reversal of 66261682 is 28616266.

It can be written as a sum of positive squares in 4 ways, for example, as 63856081 + 2405601 = 7991^2 + 1551^2 .

It is a super-2 number, since 2×66261682² = 8781221002938248, which contains 22 as substring.

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, 11044 + ... + 15952.

Almost surely, 2^66261682 is an apocalyptic number.

66261682 is a deficient number, since it is larger than the sum of its proper divisors (39264038).

66261682 is a wasteful number, since it uses less digits than its factorization.

66261682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325.

The product of its digits is 41472, while the sum is 37.

The square root of 66261682 is about 8140.1278859733. The cubic root of 66261682 is about 404.6573986257.

The spelling of 66261682 in words is "sixty-six million, two hundred sixty-one thousand, six hundred eighty-two".