23135531666 has 64 divisors (see below), whose sum is σ = 39258172800. Its totient is φ = 10151640576.

The previous prime is 23135531641. The next prime is 23135531669. The reversal of 23135531666 is 66613553132.

It is not an unprimeable number, because it can be changed into a prime (23135531669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20600981 + ... + 20602103.

It is an arithmetic number, because the mean of its divisors is an integer number (613408950).

Almost surely, 2^23135531666 is an apocalyptic number.

23135531666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

23135531666 is a deficient number, since it is larger than the sum of its proper divisors (16122641134).

23135531666 is a wasteful number, since it uses less digits than its factorization.

23135531666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563.

The product of its digits is 291600, while the sum is 41.

The spelling of 23135531666 in words is "twenty-three billion, one hundred thirty-five million, five hundred thirty-one thousand, six hundred sixty-six".