1663620572 has 6 divisors (see below), whose sum is σ = 2911336008. Its totient is φ = 831810284.

The previous prime is 1663620559. The next prime is 1663620587. The reversal of 1663620572 is 2750263661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207952568 + ... + 207952575.

It is an arithmetic number, because the mean of its divisors is an integer number (485222668).

Almost surely, 2^1663620572 is an apocalyptic number.

It is an amenable number.

1663620572 is a deficient number, since it is larger than the sum of its proper divisors (1247715436).

1663620572 is a wasteful number, since it uses less digits than its factorization.

1663620572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415905147 (or 415905145 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 1663620572 is about 40787.5050965366. The cubic root of 1663620572 is about 1184.9083520901.

The spelling of 1663620572 in words is "one billion, six hundred sixty-three million, six hundred twenty thousand, five hundred seventy-two".