1664877320 has 64 divisors (see below), whose sum is σ = 4094323200. Its totient is φ = 606551040.

The previous prime is 1664877317. The next prime is 1664877349. The reversal of 1664877320 is 237784661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18410 + ... + 60569.

It is an arithmetic number, because the mean of its divisors is an integer number (63973800).

Almost surely, 2^1664877320 is an apocalyptic number.

1664877320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664877320 is an abundant number, since it is smaller than the sum of its proper divisors (2429445880).

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

1664877320 is a wasteful number, since it uses less digits than its factorization.

1664877320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79038 (or 79034 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 1664877320 is about 40802.9082296838. The cubic root of 1664877320 is about 1185.2066485499.

The spelling of 1664877320 in words is "one billion, six hundred sixty-four million, eight hundred seventy-seven thousand, three hundred twenty".