661163832133 has 16 divisors (see below), whose sum is σ = 788523042816. Its totient is φ = 542034828720.

The previous prime is 661163832107. The next prime is 661163832169. The reversal of 661163832133 is 331238361166.

It is not a de Polignac number, because 661163832133 - 2²⁵ = 661130277701 is a prime.

It is a super-2 number, since 2×661163832133² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 661163832133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661163832733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2334360 + ... + 2602222.

It is an arithmetic number, because the mean of its divisors is an integer number (49282690176).

Almost surely, 2^661163832133 is an apocalyptic number.

It is an amenable number.

661163832133 is a deficient number, since it is larger than the sum of its proper divisors (127359210683).

661163832133 is a wasteful number, since it uses less digits than its factorization.

661163832133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283224.

The product of its digits is 279936, while the sum is 43.

The spelling of 661163832133 in words is "six hundred sixty-one billion, one hundred sixty-three million, eight hundred thirty-two thousand, one hundred thirty-three".