1660628456 has 8 divisors (see below), whose sum is σ = 3113678370. Its totient is φ = 830314224.

The previous prime is 1660628419. The next prime is 1660628477. The reversal of 1660628456 is 6548260661.

It can be written as a sum of positive squares in only one way, i.e., 1510565956 + 150062500 = 38866^2 + 12250^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103789271 + ... + 103789286.

Almost surely, 2^1660628456 is an apocalyptic number.

It is an amenable number.

1660628456 is a deficient number, since it is larger than the sum of its proper divisors (1453049914).

1660628456 is a wasteful number, since it uses less digits than its factorization.

1660628456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207578563 (or 207578559 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 1660628456 is about 40750.8092680379. The cubic root of 1660628456 is about 1184.1975508114.

The spelling of 1660628456 in words is "one billion, six hundred sixty million, six hundred twenty-eight thousand, four hundred fifty-six".