1663702992 has 120 divisors (see below), whose sum is σ = 5434580736. Its totient is φ = 465216768.

The previous prime is 1663702987. The next prime is 1663703029. The reversal of 1663702992 is 2992073661.

It is a happy number.

1663702992 is a `hidden beast` number, since 1 + 6 + 637 + 0 + 2 + 9 + 9 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29818 + ... + 64934.

Almost surely, 2^1663702992 is an apocalyptic number.

1663702992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663702992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2717290368).

1663702992 is an abundant number, since it is smaller than the sum of its proper divisors (3770877744).

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

1663702992 is a wasteful number, since it uses less digits than its factorization.

1663702992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35185 (or 35176 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 1663702992 is about 40788.5154424625. The cubic root of 1663702992 is about 1184.9279195594.

The spelling of 1663702992 in words is "one billion, six hundred sixty-three million, seven hundred two thousand, nine hundred ninety-two".