25330166166 has 16 divisors (see below), whose sum is σ = 50983011504. Its totient is φ = 8389608864.

The previous prime is 25330166137. The next prime is 25330166177. The reversal of 25330166166 is 66166103352.

It is a happy number.

It is a super-2 number, since 2×25330166166² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13443945 + ... + 13445828.

It is an arithmetic number, because the mean of its divisors is an integer number (3186438219).

Almost surely, 2^25330166166 is an apocalyptic number.

25330166166 is an abundant number, since it is smaller than the sum of its proper divisors (25652845338).

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

25330166166 is a wasteful number, since it uses less digits than its factorization.

25330166166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26889935.

The product of its (nonzero) digits is 116640, while the sum is 39.

The spelling of 25330166166 in words is "twenty-five billion, three hundred thirty million, one hundred sixty-six thousand, one hundred sixty-six".