66982831 has 8 divisors (see below), whose sum is σ = 71215200. Its totient is φ = 62860512.

The previous prime is 66982793. The next prime is 66982841. The reversal of 66982831 is 13828966.

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

It is a cyclic number.

It is not a de Polignac number, because 66982831 - 2²⁵ = 33428399 is a prime.

It is a super-2 number, since 2×66982831² = 8973399297549122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66982841) 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, 26256 + ... + 28693.

It is an arithmetic number, because the mean of its divisors is an integer number (8901900).

Almost surely, 2^66982831 is an apocalyptic number.

66982831 is a deficient number, since it is larger than the sum of its proper divisors (4232369).

66982831 is a wasteful number, since it uses less digits than its factorization.

66982831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55025.

The product of its digits is 124416, while the sum is 43.

The square root of 66982831 is about 8184.3039410814. The cubic root of 66982831 is about 406.1201141856.

It can be divided in two parts, 66 and 982831, that multiplied together give a palindrome (64866846).

The spelling of 66982831 in words is "sixty-six million, nine hundred eighty-two thousand, eight hundred thirty-one".