1660404480 has 288 divisors, whose sum is σ = 6109630464. Its totient is φ = 376455168.

The previous prime is 1660404437. The next prime is 1660404481. The reversal of 1660404480 is 844040661.

It is not an unprimeable number, because it can be changed into a prime (1660404481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5994102 + ... + 5994378.

Almost surely, 2^1660404480 is an apocalyptic number.

1660404480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660404480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3054815232).

1660404480 is an abundant number, since it is smaller than the sum of its proper divisors (4449225984).

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

1660404480 is a wasteful number, since it uses less digits than its factorization.

1660404480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 1660404480 is about 40748.0610581657. The cubic root of 1660404480 is about 1184.1443091697.

The spelling of 1660404480 in words is "one billion, six hundred sixty million, four hundred four thousand, four hundred eighty".