82721310166603 has 8 divisors (see below), whose sum is σ = 85681172094336. Its totient is φ = 79779662774400.

The previous prime is 82721310166567. The next prime is 82721310166609. The reversal of 82721310166603 is 30666101312728.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82721310166603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82721310166609) 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, 4553624638 + ... + 4553642803.

It is an arithmetic number, because the mean of its divisors is an integer number (10710146511792).

Almost surely, 2^{82721310166603} is an apocalyptic number.

82721310166603 is a deficient number, since it is larger than the sum of its proper divisors (2959861927733).

82721310166603 is a wasteful number, since it uses less digits than its factorization.

82721310166603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9107267765.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 82721310166603 in words is "eighty-two trillion, seven hundred twenty-one billion, three hundred ten million, one hundred sixty-six thousand, six hundred three".