8716421566 has 16 divisors (see below), whose sum is σ = 13394984256. Its totient is φ = 4252012576.

The previous prime is 8716421561. The next prime is 8716421617. The reversal of 8716421566 is 6651246178.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8716421561) 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, 116461 + ... + 176056.

It is an arithmetic number, because the mean of its divisors is an integer number (837186516).

Almost surely, 2^8716421566 is an apocalyptic number.

8716421566 is a deficient number, since it is larger than the sum of its proper divisors (4678562690).

8716421566 is a wasteful number, since it uses less digits than its factorization.

8716421566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292883.

The product of its digits is 483840, while the sum is 46.

The square root of 8716421566 is about 93361.7778643916. Note that the first 3 decimals coincide. The cubic root of 8716421566 is about 2058.0033412265.

The spelling of 8716421566 in words is "eight billion, seven hundred sixteen million, four hundred twenty-one thousand, five hundred sixty-six".