66376281 has 8 divisors (see below), whose sum is σ = 88558624. Its totient is φ = 44222400.

The previous prime is 66376249. The next prime is 66376283. The reversal of 66376281 is 18267366.

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

It is not a de Polignac number, because 66376281 - 2⁵ = 66376249 is a prime.

It is a super-2 number, since 2×66376281² = 8811621358781922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66376283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895 + ... + 11556.

It is an arithmetic number, because the mean of its divisors is an integer number (11069828).

Almost surely, 2^66376281 is an apocalyptic number.

It is an amenable number.

66376281 is a deficient number, since it is larger than the sum of its proper divisors (22182343).

66376281 is a wasteful number, since it uses less digits than its factorization.

66376281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14231.

The product of its digits is 72576, while the sum is 39.

The square root of 66376281 is about 8147.1639850932. The cubic root of 66376281 is about 404.8905480789.

The spelling of 66376281 in words is "sixty-six million, three hundred seventy-six thousand, two hundred eighty-one".