1166211725 has 48 divisors (see below), whose sum is σ = 1697141376. Its totient is φ = 778464000.

The previous prime is 1166211721. The next prime is 1166211763. The reversal of 1166211725 is 5271126611.

It is not a de Polignac number, because 1166211725 - 2² = 1166211721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1166211691 and 1166211700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166211721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1141715 + ... + 1142735.

It is an arithmetic number, because the mean of its divisors is an integer number (35357112).

Almost surely, 2^1166211725 is an apocalyptic number.

It is an amenable number.

1166211725 is a deficient number, since it is larger than the sum of its proper divisors (530929651).

1166211725 is a wasteful number, since it uses less digits than its factorization.

1166211725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206 (or 1201 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 1166211725 is about 34149.8422397527. The cubic root of 1166211725 is about 1052.5897449065.

The spelling of 1166211725 in words is "one billion, one hundred sixty-six million, two hundred eleven thousand, seven hundred twenty-five".