1663654252 has 72 divisors (see below), whose sum is σ = 3294527040. Its totient is φ = 733824000.

The previous prime is 1663654243. The next prime is 1663654283. The reversal of 1663654252 is 2524563661.

It is a happy 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, 2214877 + ... + 2215627.

It is an arithmetic number, because the mean of its divisors is an integer number (45757320).

Almost surely, 2^1663654252 is an apocalyptic number.

It is an amenable number.

1663654252 is a deficient number, since it is larger than the sum of its proper divisors (1630872788).

1663654252 is a wasteful number, since it uses less digits than its factorization.

1663654252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 908 counting only the distinct ones).

The product of its digits is 259200, while the sum is 40.

The square root of 1663654252 is about 40787.9179659860. The cubic root of 1663654252 is about 1184.9163481930.

The spelling of 1663654252 in words is "one billion, six hundred sixty-three million, six hundred fifty-four thousand, two hundred fifty-two".