6665250525666 has 32 divisors (see below), whose sum is σ = 13344152578560. Its totient is φ = 2219475882624.

The previous prime is 6665250525653. The next prime is 6665250525767.

6665250525666 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28163215 + ... + 28398893.

It is an arithmetic number, because the mean of its divisors is an integer number (417004768080).

Almost surely, 2^{6665250525666} is an apocalyptic number.

6665250525666 is an abundant number, since it is smaller than the sum of its proper divisors (6678902052894).

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

6665250525666 is a wasteful number, since it uses less digits than its factorization.

6665250525666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240490.

The product of its (nonzero) digits is 116640000, while the sum is 60.

The spelling of 6665250525666 in words is "six trillion, six hundred sixty-five billion, two hundred fifty million, five hundred twenty-five thousand, six hundred sixty-six".