1166021616 has 40 divisors (see below), whose sum is σ = 3143191680. Its totient is φ = 371774656.

The previous prime is 1166021603. The next prime is 1166021617. The reversal of 1166021616 is 6161206611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166021617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526986 + ... + 529193.

It is an arithmetic number, because the mean of its divisors is an integer number (78579792).

Almost surely, 2^1166021616 is an apocalyptic number.

1166021616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1166021616 is an abundant number, since it is smaller than the sum of its proper divisors (1977170064).

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

1166021616 is a wasteful number, since it uses less digits than its factorization.

1166021616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056213 (or 1056207 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 1166021616 is about 34147.0586727466. The cubic root of 1166021616 is about 1052.5325461281.

The spelling of 1166021616 in words is "one billion, one hundred sixty-six million, twenty-one thousand, six hundred sixteen".