661163832733 has 2 divisors, whose sum is σ = 661163832734. Its totient is φ = 661163832732.

The previous prime is 661163832727. The next prime is 661163832751. The reversal of 661163832733 is 337238361166.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499653887044 + 161509945689 = 706862^2 + 401883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-661163832733 is a prime.

It is a super-2 number, since 2×661163832733² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661163832793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330581916366 + 330581916367.

It is an arithmetic number, because the mean of its divisors is an integer number (330581916367).

Almost surely, 2^661163832733 is an apocalyptic number.

It is an amenable number.

661163832733 is a deficient number, since it is larger than the sum of its proper divisors (1).

661163832733 is an equidigital number, since it uses as much as digits as its factorization.

661163832733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 49.

The spelling of 661163832733 in words is "six hundred sixty-one billion, one hundred sixty-three million, eight hundred thirty-two thousand, seven hundred thirty-three".