16866667025 has 12 divisors (see below), whose sum is σ = 22523488092. Its totient is φ = 12455384640.

The previous prime is 16866667019. The next prime is 16866667049. The reversal of 16866667025 is 52076666861.

It can be written as a sum of positive squares in 6 ways, for example, as 192626641 + 16674040384 = 13879^2 + 129128^2 .

It is not a de Polignac number, because 16866667025 - 2¹² = 16866662929 is a prime.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

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, 25948394 + ... + 25949043.

It is an arithmetic number, because the mean of its divisors is an integer number (1876957341).

Almost surely, 2^16866667025 is an apocalyptic number.

It is an amenable number.

16866667025 is a deficient number, since it is larger than the sum of its proper divisors (5656821067).

16866667025 is a wasteful number, since it uses less digits than its factorization.

16866667025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51897460 (or 51897455 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 16866667025 in words is "sixteen billion, eight hundred sixty-six million, six hundred sixty-seven thousand, twenty-five".