125666227511 has 8 divisors (see below), whose sum is σ = 137636610048. Its totient is φ = 113786875000.

The previous prime is 125666227471. The next prime is 125666227549. The reversal of 125666227511 is 115722666521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125666227511 - 2¹⁸ = 125665965367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125666227591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22754615 + ... + 22760136.

It is an arithmetic number, because the mean of its divisors is an integer number (17204576256).

Almost surely, 2^125666227511 is an apocalyptic number.

125666227511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125666227511 is a deficient number, since it is larger than the sum of its proper divisors (11970382537).

125666227511 is a wasteful number, since it uses less digits than its factorization.

125666227511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45515013.

The product of its digits is 302400, while the sum is 44.

The spelling of 125666227511 in words is "one hundred twenty-five billion, six hundred sixty-six million, two hundred twenty-seven thousand, five hundred eleven".