16866745025 has 36 divisors (see below), whose sum is σ = 23199960420. Its totient is φ = 12151526400.

The previous prime is 16866745003. The next prime is 16866745061. The reversal of 16866745025 is 52054766861.

It can be written as a sum of positive squares in 18 ways, for example, as 14910363664 + 1956381361 = 122108^2 + 44231^2 .

It is not a de Polignac number, because 16866745025 - 2¹² = 16866740929 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 124541 + ... + 221909.

It is an arithmetic number, because the mean of its divisors is an integer number (644443345).

Almost surely, 2^16866745025 is an apocalyptic number.

It is an amenable number.

16866745025 is a deficient number, since it is larger than the sum of its proper divisors (6333215395).

16866745025 is a wasteful number, since it uses less digits than its factorization.

16866745025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97446 (or 97428 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 16866745025 in words is "sixteen billion, eight hundred sixty-six million, seven hundred forty-five thousand, twenty-five".