29666319661 has 4 divisors (see below), whose sum is σ = 32363257824. Its totient is φ = 26969381500.

The previous prime is 29666319593. The next prime is 29666319667. The reversal of 29666319661 is 16691366692.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29666319661 - 2¹³ = 29666311469 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 (29666319667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348469065 + ... + 1348469086.

It is an arithmetic number, because the mean of its divisors is an integer number (8090814456).

Almost surely, 2^29666319661 is an apocalyptic number.

It is an amenable number.

29666319661 is a deficient number, since it is larger than the sum of its proper divisors (2696938163).

29666319661 is a wasteful number, since it uses less digits than its factorization.

29666319661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696938162.

The product of its digits is 3779136, while the sum is 55.

The spelling of 29666319661 in words is "twenty-nine billion, six hundred sixty-six million, three hundred nineteen thousand, six hundred sixty-one".