23321545666 has 4 divisors (see below), whose sum is σ = 34982318502. Its totient is φ = 11660772832.

The previous prime is 23321545651. The next prime is 23321545669. The reversal of 23321545666 is 66654512332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22077502225 + 1244043441 = 148585^2 + 35271^2 .

It is not an unprimeable number, because it can be changed into a prime (23321545669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830386415 + ... + 5830386418.

Almost surely, 2^23321545666 is an apocalyptic number.

23321545666 is a deficient number, since it is larger than the sum of its proper divisors (11660772836).

23321545666 is a wasteful number, since it uses less digits than its factorization.

23321545666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11660772835.

The product of its digits is 777600, while the sum is 43.

The spelling of 23321545666 in words is "twenty-three billion, three hundred twenty-one million, five hundred forty-five thousand, six hundred sixty-six".