1664906960 has 40 divisors (see below), whose sum is σ = 3917561760. Its totient is φ = 657936512.

The previous prime is 1664906953. The next prime is 1664906993. The reversal of 1664906960 is 696094661.

It is a tau number, because it is divible by the number of its divisors (40).

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, 118730 + ... + 132009.

It is an arithmetic number, because the mean of its divisors is an integer number (97939044).

Almost surely, 2^1664906960 is an apocalyptic number.

1664906960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664906960 is an abundant number, since it is smaller than the sum of its proper divisors (2252654800).

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

1664906960 is a wasteful number, since it uses less digits than its factorization.

1664906960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250835 (or 250829 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 1664906960 is about 40803.2714374718. The cubic root of 1664906960 is about 1185.2136819643.

The spelling of 1664906960 in words is "one billion, six hundred sixty-four million, nine hundred six thousand, nine hundred sixty".