6566022961 has 3 divisors (see below), whose sum is σ = 6566103993. Its totient is φ = 6565941930.

The previous prime is 6566022949. The next prime is 6566022973. The reversal of 6566022961 is 1692206656.

The square root of 6566022961 is 81031.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (6566022949) and next prime (6566022973).

It is not a de Polignac number, because 6566022961 - 2¹⁹ = 6565498673 is a prime.

It is a super-2 number, since 2×6566022961² = 86225315048758415042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6566022361) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 40516 + ... + 121546.

It is an arithmetic number, because the mean of its divisors is an integer number (2188701331).

Almost surely, 2^6566022961 is an apocalyptic number.

6566022961 is the 81031-st square number.

6566022961 is the 40516-th centered octagonal number.

It is an amenable number.

6566022961 is a deficient number, since it is larger than the sum of its proper divisors (81032).

6566022961 is an frugal number, since it uses more digits than its factorization.

6566022961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162062 (or 81031 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The cubic root of 6566022961 is about 1872.5530591625.

The spelling of 6566022961 in words is "six billion, five hundred sixty-six million, twenty-two thousand, nine hundred sixty-one".