25666227098 has 4 divisors (see below), whose sum is σ = 38499340650. Its totient is φ = 12833113548.

The previous prime is 25666227061. The next prime is 25666227109. The reversal of 25666227098 is 89072266652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20852226409 + 4814000689 = 144403^2 + 69383^2 .

It is a super-2 number, since 2×25666227098² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6416556773 + ... + 6416556776.

Almost surely, 2^25666227098 is an apocalyptic number.

25666227098 is a deficient number, since it is larger than the sum of its proper divisors (12833113552).

25666227098 is a wasteful number, since it uses less digits than its factorization.

25666227098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12833113551.

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

The spelling of 25666227098 in words is "twenty-five billion, six hundred sixty-six million, two hundred twenty-seven thousand, ninety-eight".