29661042661 has 6 divisors (see below), whose sum is σ = 30148656486. Its totient is φ = 29173473000.

The previous prime is 29661042641. The next prime is 29661042667. The reversal of 29661042661 is 16624016692.

It can be written as a sum of positive squares in only one way, i.e., 17504877636 + 12156165025 = 132306^2 + 110255^2 .

It is not a de Polignac number, because 29661042661 - 2¹⁷ = 29660911589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29661042667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1334086 + ... + 1356136.

It is an arithmetic number, because the mean of its divisors is an integer number (5024776081).

Almost surely, 2^29661042661 is an apocalyptic number.

It is an amenable number.

29661042661 is a deficient number, since it is larger than the sum of its proper divisors (487613825).

29661042661 is an frugal number, since it uses more digits than its factorization.

29661042661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44163 (or 22112 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 29661042661 in words is "twenty-nine billion, six hundred sixty-one million, forty-two thousand, six hundred sixty-one".