1665503552 has 14 divisors (see below), whose sum is σ = 3304983738. Its totient is φ = 832751744.

The previous prime is 1665503509. The next prime is 1665503569. The reversal of 1665503552 is 2553055661.

It can be written as a sum of positive squares in only one way, i.e., 1656164416 + 9339136 = 40696^2 + 3056^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13011683 + ... + 13011810.

It is an arithmetic number, because the mean of its divisors is an integer number (236070267).

Almost surely, 2^1665503552 is an apocalyptic number.

It is an amenable number.

1665503552 is a deficient number, since it is larger than the sum of its proper divisors (1639480186).

1665503552 is an equidigital number, since it uses as much as digits as its factorization.

1665503552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023505 (or 26023495 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 38.

The square root of 1665503552 is about 40810.5813729724. The cubic root of 1665503552 is about 1185.3552323286.

The spelling of 1665503552 in words is "one billion, six hundred sixty-five million, five hundred three thousand, five hundred fifty-two".