25073226666 has 12 divisors (see below), whose sum is σ = 54325324482. Its totient is φ = 8357742216.

The previous prime is 25073226623. The next prime is 25073226691. The reversal of 25073226666 is 66662237052.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23645520441 + 1427706225 = 153771^2 + 37785^2 .

It is a super-2 number, since 2×25073226666² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 696478501 + ... + 696478536.

Almost surely, 2^25073226666 is an apocalyptic number.

25073226666 is an abundant number, since it is smaller than the sum of its proper divisors (29252097816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25073226666 is a wasteful number, since it uses less digits than its factorization.

25073226666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392957045 (or 1392957042 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 25073226666 in words is "twenty-five billion, seventy-three million, two hundred twenty-six thousand, six hundred sixty-six".