1664058840 has 32 divisors (see below), whose sum is σ = 4992176880. Its totient is φ = 443748992.

The previous prime is 1664058839. The next prime is 1664058853. The reversal of 1664058840 is 488504661.

1664058840 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1664058792 and 1664058801.

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, 6933459 + ... + 6933698.

Almost surely, 2^1664058840 is an apocalyptic number.

1664058840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664058840 is an abundant number, since it is smaller than the sum of its proper divisors (3328118040).

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

1664058840 is a wasteful number, since it uses less digits than its factorization.

1664058840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13867171 (or 13867167 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 1664058840 is about 40792.8773194537. The cubic root of 1664058840 is about 1185.0123946077.

The spelling of 1664058840 in words is "one billion, six hundred sixty-four million, fifty-eight thousand, eight hundred forty".