23675621666 has 8 divisors (see below), whose sum is σ = 35739633180. Its totient is φ = 11762410608.

The previous prime is 23675621653. The next prime is 23675621681. The reversal of 23675621666 is 66612657632.

It can be written as a sum of positive squares in 2 ways, for example, as 20120004025 + 3555617641 = 141845^2 + 59629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×23675621666² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37699721 + ... + 37700348.

Almost surely, 2^23675621666 is an apocalyptic number.

23675621666 is a deficient number, since it is larger than the sum of its proper divisors (12064011514).

23675621666 is a wasteful number, since it uses less digits than its factorization.

23675621666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75400228.

The product of its digits is 3265920, while the sum is 50.

The spelling of 23675621666 in words is "twenty-three billion, six hundred seventy-five million, six hundred twenty-one thousand, six hundred sixty-six".