1668590544 has 40 divisors (see below), whose sum is σ = 4348685952. Its totient is φ = 551272960.

The previous prime is 1668590519. The next prime is 1668590563. The reversal of 1668590544 is 4450958661.

1668590544 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1668590493 and 1668590502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148392 + ... + 159239.

Almost surely, 2^1668590544 is an apocalyptic number.

It is an amenable number.

1668590544 is an abundant number, since it is smaller than the sum of its proper divisors (2680095408).

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

1668590544 is a wasteful number, since it uses less digits than its factorization.

1668590544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307755 (or 307749 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The square root of 1668590544 is about 40848.3848395503. The cubic root of 1668590544 is about 1186.0871278343.

The spelling of 1668590544 in words is "one billion, six hundred sixty-eight million, five hundred ninety thousand, five hundred forty-four".