1660403264 has 28 divisors (see below), whose sum is σ = 3548315484. Its totient is φ = 766339584.

The previous prime is 1660403221. The next prime is 1660403267. The reversal of 1660403264 is 4623040661.

It can be written as a sum of positive squares in 2 ways, for example, as 887563264 + 772840000 = 29792^2 + 27800^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1660403264.

It is not an unprimeable number, because it can be changed into a prime (1660403267) 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 3 ways as a sum of consecutive naturals, for example, 997007 + ... + 998670.

It is an arithmetic number, because the mean of its divisors is an integer number (126725553).

Almost surely, 2^1660403264 is an apocalyptic number.

It is an amenable number.

1660403264 is an abundant number, since it is smaller than the sum of its proper divisors (1887912220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1660403264 is a wasteful number, since it uses less digits than its factorization.

1660403264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995702 (or 1995692 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 1660403264 is about 40748.0461372076. The cubic root of 1660403264 is about 1184.1440200996.

The spelling of 1660403264 in words is "one billion, six hundred sixty million, four hundred three thousand, two hundred sixty-four".