82667677032721 has 4 divisors (see below), whose sum is σ = 90182920399344. Its totient is φ = 75152433666100.

The previous prime is 82667677032691. The next prime is 82667677032727. The reversal of 82667677032721 is 12723077676628.

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 82667677032721 - 2¹⁹ = 82667676508433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82667677032727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3757621683295 + ... + 3757621683316.

It is an arithmetic number, because the mean of its divisors is an integer number (22545730099836).

Almost surely, 2^{82667677032721} is an apocalyptic number.

It is an amenable number.

82667677032721 is a deficient number, since it is larger than the sum of its proper divisors (7515243366623).

82667677032721 is a wasteful number, since it uses less digits than its factorization.

82667677032721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7515243366622.

The product of its (nonzero) digits is 99574272, while the sum is 64.

The spelling of 82667677032721 in words is "eighty-two trillion, six hundred sixty-seven billion, six hundred seventy-seven million, thirty-two thousand, seven hundred twenty-one".