12217162566 has 16 divisors (see below), whose sum is σ = 27924943104. Its totient is φ = 3490617864.

The previous prime is 12217162547. The next prime is 12217162567. The reversal of 12217162566 is 66526171221.

It is a super-2 number, since 2×12217162566² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12217162567) 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, 145442370 + ... + 145442453.

It is an arithmetic number, because the mean of its divisors is an integer number (1745308944).

Almost surely, 2^12217162566 is an apocalyptic number.

12217162566 is an abundant number, since it is smaller than the sum of its proper divisors (15707780538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12217162566 is a wasteful number, since it uses less digits than its factorization.

12217162566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290884835.

The product of its digits is 60480, while the sum is 39.

The spelling of 12217162566 in words is "twelve billion, two hundred seventeen million, one hundred sixty-two thousand, five hundred sixty-six".