1664404546 has 16 divisors (see below), whose sum is σ = 2854071360. Its totient is φ = 713114640.

The previous prime is 1664404543. The next prime is 1664404583. The reversal of 1664404546 is 6454044661.

It is a super-2 number, since 2×1664404546² = 5540484985490932232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1664404499 and 1664404508.

It is not an unprimeable number, because it can be changed into a prime (1664404543) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 41476 + ... + 71056.

It is an arithmetic number, because the mean of its divisors is an integer number (178379460).

Almost surely, 2^1664404546 is an apocalyptic number.

1664404546 is a deficient number, since it is larger than the sum of its proper divisors (1189666814).

1664404546 is a wasteful number, since it uses less digits than its factorization.

1664404546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33609.

The product of its (nonzero) digits is 276480, while the sum is 40.

The square root of 1664404546 is about 40797.1144322733. The cubic root of 1664404546 is about 1185.0944505060.

The spelling of 1664404546 in words is "one billion, six hundred sixty-four million, four hundred four thousand, five hundred forty-six".