1166726651 has 4 divisors (see below), whose sum is σ = 1166967912. Its totient is φ = 1166485392.

The previous prime is 1166726621. The next prime is 1166726669. The reversal of 1166726651 is 1566276611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1566276611 = 433 ⋅3617267.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166726651 is a prime.

It is a super-2 number, since 2×1166726651² = 2722502156307351602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1166726599 and 1166726608.

It is not an unprimeable number, because it can be changed into a prime (1166726621) 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, 113225 + ... + 123098.

It is an arithmetic number, because the mean of its divisors is an integer number (291741978).

Almost surely, 2^1166726651 is an apocalyptic number.

1166726651 is a deficient number, since it is larger than the sum of its proper divisors (241261).

1166726651 is an equidigital number, since it uses as much as digits as its factorization.

1166726651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241260.

The product of its digits is 90720, while the sum is 41.

The square root of 1166726651 is about 34157.3806226414. The cubic root of 1166726651 is about 1052.7446413297.

The spelling of 1166726651 in words is "one billion, one hundred sixty-six million, seven hundred twenty-six thousand, six hundred fifty-one".