1664245360 has 20 divisors (see below), whose sum is σ = 3869370648. Its totient is φ = 665698112.

The previous prime is 1664245333. The next prime is 1664245381. The reversal of 1664245360 is 635424661.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10401454 + ... + 10401613.

Almost surely, 2^1664245360 is an apocalyptic number.

1664245360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664245360 is an abundant number, since it is smaller than the sum of its proper divisors (2205125288).

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

1664245360 is a wasteful number, since it uses less digits than its factorization.

1664245360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20803080 (or 20803074 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 1664245360 is about 40795.1634388196. The cubic root of 1664245360 is about 1185.0566679328.

The spelling of 1664245360 in words is "one billion, six hundred sixty-four million, two hundred forty-five thousand, three hundred sixty".