1616600660 has 12 divisors (see below), whose sum is σ = 3394861428. Its totient is φ = 646640256.

The previous prime is 1616600659. The next prime is 1616600663. The reversal of 1616600660 is 660066161.

It can be written as a sum of positive squares in 2 ways, for example, as 519931204 + 1096669456 = 22802^2 + 33116^2 .

It is a super-2 number, since 2×1616600660² = 5226795387824871200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616600663) 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, 40414997 + ... + 40415036.

It is an arithmetic number, because the mean of its divisors is an integer number (282905119).

Almost surely, 2^1616600660 is an apocalyptic number.

1616600660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616600660 is an abundant number, since it is smaller than the sum of its proper divisors (1778260768).

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

1616600660 is a wasteful number, since it uses less digits than its factorization.

1616600660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80830042 (or 80830040 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1616600660 is about 40206.9727783627. The cubic root of 1616600660 is about 1173.6382377009.

The spelling of 1616600660 in words is "one billion, six hundred sixteen million, six hundred thousand, six hundred sixty".