1660617256 has 32 divisors (see below), whose sum is σ = 3410505000. Its totient is φ = 754518016.

The previous prime is 1660617251. The next prime is 1660617317. The reversal of 1660617256 is 6527160661.

It can be written as a sum of positive squares in 4 ways, for example, as 1660562500 + 54756 = 40750^2 + 234^2 .

It is not an unprimeable number, because it can be changed into a prime (1660617251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206581 + ... + 214468.

Almost surely, 2^1660617256 is an apocalyptic number.

It is an amenable number.

1660617256 is an abundant number, since it is smaller than the sum of its proper divisors (1749887744).

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

1660617256 is a wasteful number, since it uses less digits than its factorization.

1660617256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421101 (or 421097 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1660617256 is about 40750.6718472223. The cubic root of 1660617256 is about 1184.1948885578.

The spelling of 1660617256 in words is "one billion, six hundred sixty million, six hundred seventeen thousand, two hundred fifty-six".