1664714856 has 32 divisors (see below), whose sum is σ = 4756328640. Its totient is φ = 475632768.

The previous prime is 1664714809. The next prime is 1664714879. The reversal of 1664714856 is 6584174661.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4954341 + ... + 4954676.

It is an arithmetic number, because the mean of its divisors is an integer number (148635270).

Almost surely, 2^1664714856 is an apocalyptic number.

It is an amenable number.

1664714856 is an abundant number, since it is smaller than the sum of its proper divisors (3091613784).

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

1664714856 is a wasteful number, since it uses less digits than its factorization.

1664714856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9909033 (or 9909029 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 1664714856 is about 40800.9173426285. The cubic root of 1664714856 is about 1185.1680952234.

The spelling of 1664714856 in words is "one billion, six hundred sixty-four million, seven hundred fourteen thousand, eight hundred fifty-six".