23066655721 has 16 divisors (see below), whose sum is σ = 23336921088. Its totient is φ = 22798540800.

The previous prime is 23066655713. The next prime is 23066655749. The reversal of 23066655721 is 12755666032.

It is a cyclic number.

It is not a de Polignac number, because 23066655721 - 2³ = 23066655713 is a prime.

It is a super-2 number, since 2×23066655721² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23066655701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34274041 + ... + 34274713.

It is an arithmetic number, because the mean of its divisors is an integer number (1458557568).

Almost surely, 2^23066655721 is an apocalyptic number.

It is an amenable number.

23066655721 is a deficient number, since it is larger than the sum of its proper divisors (270265367).

23066655721 is a wasteful number, since it uses less digits than its factorization.

23066655721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752.

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 23066655721 in words is "twenty-three billion, sixty-six million, six hundred fifty-five thousand, seven hundred twenty-one".