16566001012 has 24 divisors (see below), whose sum is σ = 31939139232. Its totient is φ = 7455444000.

The previous prime is 16566001003. The next prime is 16566001019. The reversal of 16566001012 is 21010066561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16566001019) 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, 1859418 + ... + 1868305.

It is an arithmetic number, because the mean of its divisors is an integer number (1330797468).

Almost surely, 2^16566001012 is an apocalyptic number.

It is an amenable number.

16566001012 is a deficient number, since it is larger than the sum of its proper divisors (15373138220).

16566001012 is a wasteful number, since it uses less digits than its factorization.

16566001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727839 (or 3727837 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 16566001012 its reverse (21010066561), we get a palindrome (37576067573).

The spelling of 16566001012 in words is "sixteen billion, five hundred sixty-six million, one thousand, twelve".