1660384446 has 16 divisors (see below), whose sum is σ = 3795164544. Its totient is φ = 474395544.

The previous prime is 1660384433. The next prime is 1660384447. The reversal of 1660384446 is 6444830661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 39532963 = 1660384446 / (1 + 6 + 6 + 0 + 3 + 8 + 4 + 4 + 4 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 1660384398 and 1660384407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660384447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19766440 + ... + 19766523.

It is an arithmetic number, because the mean of its divisors is an integer number (237197784).

Almost surely, 2^1660384446 is an apocalyptic number.

1660384446 is an abundant number, since it is smaller than the sum of its proper divisors (2134780098).

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

1660384446 is a wasteful number, since it uses less digits than its factorization.

1660384446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39532975.

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 1660384446 is about 40747.8152297764. The cubic root of 1660384446 is about 1184.1395466268.

The spelling of 1660384446 in words is "one billion, six hundred sixty million, three hundred eighty-four thousand, four hundred forty-six".