1661116052 has 12 divisors (see below), whose sum is σ = 2908440276. Its totient is φ = 830133120.

The previous prime is 1661116007. The next prime is 1661116063. The reversal of 1661116052 is 2506111661.

It can be written as a sum of positive squares in 2 ways, for example, as 348792976 + 1312323076 = 18676^2 + 36226^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97349 + ... + 113132.

It is an arithmetic number, because the mean of its divisors is an integer number (242370023).

Almost surely, 2^1661116052 is an apocalyptic number.

It is an amenable number.

1661116052 is a deficient number, since it is larger than the sum of its proper divisors (1247324224).

1661116052 is a wasteful number, since it uses less digits than its factorization.

1661116052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212458 (or 212456 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1661116052 is about 40756.7914831381. The cubic root of 1661116052 is about 1184.3134413713.

The spelling of 1661116052 in words is "one billion, six hundred sixty-one million, one hundred sixteen thousand, fifty-two".