1167722666 has 32 divisors (see below), whose sum is σ = 1942291008. Its totient is φ = 522109440.

The previous prime is 1167722623. The next prime is 1167722669. The reversal of 1167722666 is 6662277611.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1167722669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367601 + ... + 370763.

It is an arithmetic number, because the mean of its divisors is an integer number (60696594).

Almost surely, 2^1167722666 is an apocalyptic number.

1167722666 is a deficient number, since it is larger than the sum of its proper divisors (774568342).

1167722666 is a wasteful number, since it uses less digits than its factorization.

1167722666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446.

The product of its digits is 254016, while the sum is 44.

The square root of 1167722666 is about 34171.9573041990. The cubic root of 1167722666 is about 1053.0441262799.

Subtracting 1167722666 from its reverse (6662277611), we obtain a palindrome (5494554945).

It can be divided in two parts, 11677 and 22666, that added together give a palindrome (34343).

The spelling of 1167722666 in words is "one billion, one hundred sixty-seven million, seven hundred twenty-two thousand, six hundred sixty-six".