1665359063 has 12 divisors (see below), whose sum is σ = 1763941608. Its totient is φ = 1572037200.

The previous prime is 1665359053. The next prime is 1665359077. The reversal of 1665359063 is 3609535661.

It is not a de Polignac number, because 1665359063 - 2¹² = 1665354967 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665359053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94013 + ... + 110313.

It is an arithmetic number, because the mean of its divisors is an integer number (146995134).

Almost surely, 2^1665359063 is an apocalyptic number.

1665359063 is a deficient number, since it is larger than the sum of its proper divisors (98582545).

1665359063 is a wasteful number, since it uses less digits than its factorization.

1665359063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16622 (or 16603 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 44.

The square root of 1665359063 is about 40808.8110951544. The cubic root of 1665359063 is about 1185.3209532572.

The spelling of 1665359063 in words is "one billion, six hundred sixty-five million, three hundred fifty-nine thousand, sixty-three".