1660607656 has 16 divisors (see below), whose sum is σ = 3197792340. Its totient is φ = 807863040.

The previous prime is 1660607653. The next prime is 1660607701. The reversal of 1660607656 is 6567060661.

It can be written as a sum of positive squares in 2 ways, for example, as 1642680900 + 17926756 = 40530^2 + 4234^2 .

It is not an unprimeable number, because it can be changed into a prime (1660607653) 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, 2804785 + ... + 2805376.

Almost surely, 2^1660607656 is an apocalyptic number.

It is an amenable number.

1660607656 is a deficient number, since it is larger than the sum of its proper divisors (1537184684).

1660607656 is a wasteful number, since it uses less digits than its factorization.

1660607656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610204 (or 5610200 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 1660607656 is about 40750.5540575831. The cubic root of 1660607656 is about 1184.1926066166.

The spelling of 1660607656 in words is "one billion, six hundred sixty million, six hundred seven thousand, six hundred fifty-six".