1664337858 has 16 divisors (see below), whose sum is σ = 3436052736. Its totient is φ = 536883120.

The previous prime is 1664337803. The next prime is 1664337863. The reversal of 1664337858 is 8587334661.

It is a self number, because there is not a number n which added to its sum of digits gives 1664337858.

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, 4473841 + ... + 4474212.

It is an arithmetic number, because the mean of its divisors is an integer number (214753296).

Almost surely, 2^1664337858 is an apocalyptic number.

1664337858 is an abundant number, since it is smaller than the sum of its proper divisors (1771714878).

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

1664337858 is a wasteful number, since it uses less digits than its factorization.

1664337858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8948089.

The product of its digits is 2903040, while the sum is 51.

The square root of 1664337858 is about 40796.2971113801. The cubic root of 1664337858 is about 1185.0786224962.

The spelling of 1664337858 in words is "one billion, six hundred sixty-four million, three hundred thirty-seven thousand, eight hundred fifty-eight".