1161556066 has 8 divisors (see below), whose sum is σ = 1900728144. Its totient is φ = 527980020.

The previous prime is 1161556063. The next prime is 1161556079. The reversal of 1161556066 is 6606551611.

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

It is a super-2 number, since 2×1161556066² = 2698424988922792712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1161556063) 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, 26398980 + ... + 26399023.

It is an arithmetic number, because the mean of its divisors is an integer number (237591018).

Almost surely, 2^1161556066 is an apocalyptic number.

1161556066 is a deficient number, since it is larger than the sum of its proper divisors (739172078).

1161556066 is a wasteful number, since it uses less digits than its factorization.

1161556066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52798016.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 1161556066 is about 34081.6089115523. The cubic root of 1161556066 is about 1051.1871881081.

It can be divided in two parts, 116155 and 6066, that added together give a palindrome (122221).

The spelling of 1161556066 in words is "one billion, one hundred sixty-one million, five hundred fifty-six thousand, sixty-six".