1166616550 has 24 divisors (see below), whose sum is σ = 2367172152. Its totient is φ = 424224000.

The previous prime is 1166616547. The next prime is 1166616589. The reversal of 1166616550 is 556166611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1060011 + ... + 1061110.

It is an arithmetic number, because the mean of its divisors is an integer number (98632173).

Almost surely, 2^1166616550 is an apocalyptic number.

1166616550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1166616550 is an abundant number, since it is smaller than the sum of its proper divisors (1200555602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1166616550 is a wasteful number, since it uses less digits than its factorization.

1166616550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121144 (or 2121139 counting only the distinct ones).

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

The square root of 1166616550 is about 34155.7689124400. The cubic root of 1166616550 is about 1052.7115253512.

It can be divided in two parts, 1166 and 616550, that added together give a palindrome (617716).

The spelling of 1166616550 in words is "one billion, one hundred sixty-six million, six hundred sixteen thousand, five hundred fifty".