125066734602665 has 4 divisors (see below), whose sum is σ = 150080081523204. Its totient is φ = 100053387682128.

The previous prime is 125066734602659. The next prime is 125066734602697. The reversal of 125066734602665 is 566206437660521.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36820174969369 + 88246559633296 = 6067963^2 + 9393964^2 .

It is a cyclic number.

It is not a de Polignac number, because 125066734602665 - 2⁸ = 125066734602409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12506673460262 + ... + 12506673460271.

It is an arithmetic number, because the mean of its divisors is an integer number (37520020380801).

Almost surely, 2^{125066734602665} is an apocalyptic number.

It is an amenable number.

125066734602665 is a deficient number, since it is larger than the sum of its proper divisors (25013346920539).

125066734602665 is an equidigital number, since it uses as much as digits as its factorization.

125066734602665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25013346920538.

The product of its (nonzero) digits is 65318400, while the sum is 59.

The spelling of 125066734602665 in words is "one hundred twenty-five trillion, sixty-six billion, seven hundred thirty-four million, six hundred two thousand, six hundred sixty-five".