82667728262857 has 4 divisors (see below), whose sum is σ = 82667811126016. Its totient is φ = 82667645399700.

The previous prime is 82667728262839. The next prime is 82667728262879. The reversal of 82667728262857 is 75826282776628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82667728262857 - 2¹⁵ = 82667728230089 is a prime.

It is a super-2 number, since 2×82667728262857² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82667728262557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39916653 + ... + 41936554.

It is an arithmetic number, because the mean of its divisors is an integer number (20666952781504).

Almost surely, 2^{82667728262857} is an apocalyptic number.

It is an amenable number.

82667728262857 is a deficient number, since it is larger than the sum of its proper divisors (82863159).

82667728262857 is a wasteful number, since it uses less digits than its factorization.

82667728262857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82863158.

The product of its digits is 3034644480, while the sum is 76.

The spelling of 82667728262857 in words is "eighty-two trillion, six hundred sixty-seven billion, seven hundred twenty-eight million, two hundred sixty-two thousand, eight hundred fifty-seven".