1661616632 has 32 divisors (see below), whose sum is σ = 3367358400. Its totient is φ = 764118144.

The previous prime is 1661616613. The next prime is 1661616641. The reversal of 1661616632 is 2366161661.

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 7 ways as a sum of consecutive naturals, for example, 32 + ... + 57647.

It is an arithmetic number, because the mean of its divisors is an integer number (105229950).

Almost surely, 2^1661616632 is an apocalyptic number.

It is an amenable number.

1661616632 is an abundant number, since it is smaller than the sum of its proper divisors (1705741768).

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

1661616632 is a wasteful number, since it uses less digits than its factorization.

1661616632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57975 (or 57971 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 1661616632 is about 40762.9320829599. The cubic root of 1661616632 is about 1184.4323943448.

The spelling of 1661616632 in words is "one billion, six hundred sixty-one million, six hundred sixteen thousand, six hundred thirty-two".