1666980448 has 24 divisors (see below), whose sum is σ = 3750706512. Its totient is φ = 714420096.

The previous prime is 1666980439. The next prime is 1666980463. The reversal of 1666980448 is 8440896661.

It is a junction number, because it is equal to n+sod(n) for n = 1666980395 and 1666980404.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3720715 + ... + 3721162.

It is an arithmetic number, because the mean of its divisors is an integer number (156279438).

Almost surely, 2^1666980448 is an apocalyptic number.

It is an amenable number.

1666980448 is an abundant number, since it is smaller than the sum of its proper divisors (2083726064).

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

1666980448 is an equidigital number, since it uses as much as digits as its factorization.

1666980448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7441894 (or 7441886 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The square root of 1666980448 is about 40828.6718863105. The cubic root of 1666980448 is about 1185.7055026093.

The spelling of 1666980448 in words is "one billion, six hundred sixty-six million, nine hundred eighty thousand, four hundred forty-eight".