1662403656 has 64 divisors (see below), whose sum is σ = 4360003200. Its totient is φ = 527475200.

The previous prime is 1662403649. The next prime is 1662403679. The reversal of 1662403656 is 6563042661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32596 + ... + 66236.

It is an arithmetic number, because the mean of its divisors is an integer number (68125050).

Almost surely, 2^1662403656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662403656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2180001600).

1662403656 is an abundant number, since it is smaller than the sum of its proper divisors (2697599544).

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

1662403656 is a wasteful number, since it uses less digits than its factorization.

1662403656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33750 (or 33746 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 1662403656 is about 40772.5846127027. The cubic root of 1662403656 is about 1184.6193667921.

The spelling of 1662403656 in words is "one billion, six hundred sixty-two million, four hundred three thousand, six hundred fifty-six".