1661063016 has 16 divisors (see below), whose sum is σ = 4152657600. Its totient is φ = 553687664.

The previous prime is 1661062993. The next prime is 1661063051. The reversal of 1661063016 is 6103601661.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34605456 + ... + 34605503.

It is an arithmetic number, because the mean of its divisors is an integer number (259541100).

Almost surely, 2^1661063016 is an apocalyptic number.

It is an amenable number.

1661063016 is an abundant number, since it is smaller than the sum of its proper divisors (2491594584).

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

1661063016 is a wasteful number, since it uses less digits than its factorization.

1661063016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69210968 (or 69210964 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1661063016 is about 40756.1408379155. The cubic root of 1661063016 is about 1184.3008370109.

Adding to 1661063016 its reverse (6103601661), we get a palindrome (7764664677).

The spelling of 1661063016 in words is "one billion, six hundred sixty-one million, sixty-three thousand, sixteen".