661822682299 has 4 divisors (see below), whose sum is σ = 661930284400. Its totient is φ = 661715080200.

The previous prime is 661822682233. The next prime is 661822682303. The reversal of 661822682299 is 992286228166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 661822682299 - 2²⁹ = 661285811387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661822682219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53791824 + ... + 53804125.

It is an arithmetic number, because the mean of its divisors is an integer number (165482571100).

Almost surely, 2^661822682299 is an apocalyptic number.

661822682299 is a deficient number, since it is larger than the sum of its proper divisors (107602101).

661822682299 is a wasteful number, since it uses less digits than its factorization.

661822682299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107602100.

The product of its digits is 17915904, while the sum is 61.

The spelling of 661822682299 in words is "six hundred sixty-one billion, eight hundred twenty-two million, six hundred eighty-two thousand, two hundred ninety-nine".