1663491002 has 16 divisors (see below), whose sum is σ = 2628491040. Its totient is φ = 787391568.

The previous prime is 1663490989. The next prime is 1663491013. The reversal of 1663491002 is 2001943661.

It is a self number, because there is not a number n which added to its sum of digits gives 1663491002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38888 + ... + 69564.

It is an arithmetic number, because the mean of its divisors is an integer number (164280690).

Almost surely, 2^1663491002 is an apocalyptic number.

1663491002 is a deficient number, since it is larger than the sum of its proper divisors (965000038).

1663491002 is a wasteful number, since it uses less digits than its factorization.

1663491002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32125.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1663491002 is about 40785.9167115317. The cubic root of 1663491002 is about 1184.8775893541.

The spelling of 1663491002 in words is "one billion, six hundred sixty-three million, four hundred ninety-one thousand, two".