10721276516566 has 96 divisors (see below), whose sum is σ = 21110551547904. Its totient is φ = 3989796888000.

The previous prime is 10721276516563. The next prime is 10721276516567. The reversal of 10721276516566 is 66561567212701.

It is a super-2 number, since 2×10721276516566² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721276516563) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27116091 + ... + 27508633.

It is an arithmetic number, because the mean of its divisors is an integer number (219901578624).

Almost surely, 2^{10721276516566} is an apocalyptic number.

10721276516566 is a deficient number, since it is larger than the sum of its proper divisors (10389275031338).

10721276516566 is a wasteful number, since it uses less digits than its factorization.

10721276516566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393298 (or 393287 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 10721276516566 in words is "ten trillion, seven hundred twenty-one billion, two hundred seventy-six million, five hundred sixteen thousand, five hundred sixty-six".