1611666116 has 24 divisors (see below), whose sum is σ = 2892070104. Its totient is φ = 785594880.

The previous prime is 1611666107. The next prime is 1611666149. The reversal of 1611666116 is 6116661161.

It can be written as a sum of positive squares in 4 ways, for example, as 447491716 + 1164174400 = 21154^2 + 34120^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655 + ... + 56798.

It is an arithmetic number, because the mean of its divisors is an integer number (120502921).

Almost surely, 2^1611666116 is an apocalyptic number.

It is an amenable number.

1611666116 is a deficient number, since it is larger than the sum of its proper divisors (1280403988).

1611666116 is a wasteful number, since it uses less digits than its factorization.

1611666116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58631 (or 58629 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 1611666116 is about 40145.5615977657. The cubic root of 1611666116 is about 1172.4428750604.

The spelling of 1611666116 in words is "one billion, six hundred eleven million, six hundred sixty-six thousand, one hundred sixteen".