125666376331 has 4 divisors (see below), whose sum is σ = 125694576072. Its totient is φ = 125638176592.

The previous prime is 125666376323. The next prime is 125666376439. The reversal of 125666376331 is 133673666521.

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

It is a cyclic number.

It is not a de Polignac number, because 125666376331 - 2³ = 125666376323 is a prime.

It is a super-2 number, since 2×125666376331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125666371331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14093185 + ... + 14102098.

It is an arithmetic number, because the mean of its divisors is an integer number (31423644018).

Almost surely, 2^125666376331 is an apocalyptic number.

125666376331 is a deficient number, since it is larger than the sum of its proper divisors (28199741).

125666376331 is an equidigital number, since it uses as much as digits as its factorization.

125666376331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28199740.

The product of its digits is 2449440, while the sum is 49.

The spelling of 125666376331 in words is "one hundred twenty-five billion, six hundred sixty-six million, three hundred seventy-six thousand, three hundred thirty-one".