661327422336 has 192 divisors, whose sum is σ = 2245060147200. Its totient is φ = 182855439360.

The previous prime is 661327422311. The next prime is 661327422337. The reversal of 661327422336 is 633224723166.

661327422336 is a `hidden beast` number, since 6 + 613 + 2 + 7 + 4 + 2 + 23 + 3 + 6 = 666.

661327422336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×661327422336² (a number of 24 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 661327422291 and 661327422300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661327422337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1072756 + ... + 1572723.

It is an arithmetic number, because the mean of its divisors is an integer number (11693021600).

Almost surely, 2^661327422336 is an apocalyptic number.

It is an amenable number.

661327422336 is an abundant number, since it is smaller than the sum of its proper divisors (1583732724864).

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

661327422336 is a wasteful number, since it uses less digits than its factorization.

661327422336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645537 (or 2645522 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 45.

The spelling of 661327422336 in words is "six hundred sixty-one billion, three hundred twenty-seven million, four hundred twenty-two thousand, three hundred thirty-six".