15016005666 has 24 divisors (see below), whose sum is σ = 33739668144. Its totient is φ = 5005335060.

The previous prime is 15016005643. The next prime is 15016005677. The reversal of 15016005666 is 66650061051.

It is a super-2 number, since 2×15016005666² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15016005666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15448080 + ... + 15449051.

It is an arithmetic number, because the mean of its divisors is an integer number (1405819506).

Almost surely, 2^15016005666 is an apocalyptic number.

15016005666 is an abundant number, since it is smaller than the sum of its proper divisors (18723662478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15016005666 is an equidigital number, since it uses as much as digits as its factorization.

15016005666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30897148 (or 30897136 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 15016005666 in words is "fifteen billion, sixteen million, five thousand, six hundred sixty-six".