1167557666 has 8 divisors (see below), whose sum is σ = 1910548944. Its totient is φ = 530708020.

The previous prime is 1167557627. The next prime is 1167557747. The reversal of 1167557666 is 6667557611.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26535380 + ... + 26535423.

It is an arithmetic number, because the mean of its divisors is an integer number (238818618).

Almost surely, 2^1167557666 is an apocalyptic number.

1167557666 is a deficient number, since it is larger than the sum of its proper divisors (742991278).

1167557666 is a wasteful number, since it uses less digits than its factorization.

1167557666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53070816.

The product of its digits is 1587600, while the sum is 50.

The square root of 1167557666 is about 34169.5429586057. The cubic root of 1167557666 is about 1052.9945253286.

Subtracting 1167557666 from its reverse (6667557611), we obtain a palindrome (5499999945).

It can be divided in two parts, 116755 and 7666, that added together give a palindrome (124421).

The spelling of 1167557666 in words is "one billion, one hundred sixty-seven million, five hundred fifty-seven thousand, six hundred sixty-six".