29642661 has 12 divisors (see below), whose sum is σ = 43974892. Its totient is φ = 19227456.

The previous prime is 29642647. The next prime is 29642663. The reversal of 29642661 is 16624692.

29642661 is a `hidden beast` number, since 2 + 9 + 642 + 6 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18792225 + 10850436 = 4335^2 + 3294^2 .

It is not a de Polignac number, because 29642661 - 2⁵ = 29642629 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 (29642663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44176 + ... + 44841.

Almost surely, 2^29642661 is an apocalyptic number.

It is an amenable number.

29642661 is a deficient number, since it is larger than the sum of its proper divisors (14332231).

29642661 is a wasteful number, since it uses less digits than its factorization.

29642661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89060 (or 89057 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 29642661 is about 5444.5074157356. The cubic root of 29642661 is about 309.4846136226.

It can be divided in two parts, 29642 and 661, that added together give a palindrome (30303).

The spelling of 29642661 in words is "twenty-nine million, six hundred forty-two thousand, six hundred sixty-one".