25744894066 has 4 divisors (see below), whose sum is σ = 38617341102. Its totient is φ = 12872447032.

The previous prime is 25744894033. The next prime is 25744894099. The reversal of 25744894066 is 66049844752.

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

It is an interprime number because it is at equal distance from previous prime (25744894033) and next prime (25744894099).

It can be written as a sum of positive squares in only one way, i.e., 17537440041 + 8207454025 = 132429^2 + 90595^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25744893998 and 25744894016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436223515 + ... + 6436223518.

Almost surely, 2^25744894066 is an apocalyptic number.

25744894066 is a deficient number, since it is larger than the sum of its proper divisors (12872447036).

25744894066 is a wasteful number, since it uses less digits than its factorization.

25744894066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12872447035.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 25744894066 in words is "twenty-five billion, seven hundred forty-four million, eight hundred ninety-four thousand, sixty-six".