1661822104 has 16 divisors (see below), whose sum is σ = 3116988000. Its totient is φ = 830625312.

The previous prime is 1661822093. The next prime is 1661822159. The reversal of 1661822104 is 4012281661.

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, 9904 + ... + 58495.

It is an arithmetic number, because the mean of its divisors is an integer number (194811750).

Almost surely, 2^1661822104 is an apocalyptic number.

It is an amenable number.

1661822104 is a deficient number, since it is larger than the sum of its proper divisors (1455165896).

1661822104 is a wasteful number, since it uses less digits than its factorization.

1661822104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71442 (or 71438 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1661822104 is about 40765.4523340536. The cubic root of 1661822104 is about 1184.4812138012.

The spelling of 1661822104 in words is "one billion, six hundred sixty-one million, eight hundred twenty-two thousand, one hundred four".