23783728066 has 16 divisors (see below), whose sum is σ = 42178040640. Its totient is φ = 9841542480.

The previous prime is 23783728063. The next prime is 23783728069. The reversal of 23783728066 is 66082738732.

It is an interprime number because it is at equal distance from previous prime (23783728063) and next prime (23783728069).

It is a super-2 number, since 2×23783728066² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23783728063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29289900 + ... + 29290711.

It is an arithmetic number, because the mean of its divisors is an integer number (2636127540).

Almost surely, 2^23783728066 is an apocalyptic number.

23783728066 is a deficient number, since it is larger than the sum of its proper divisors (18394312574).

23783728066 is a wasteful number, since it uses less digits than its factorization.

23783728066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58580649.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 23783728066 in words is "twenty-three billion, seven hundred eighty-three million, seven hundred twenty-eight thousand, sixty-six".