1664465101 has 4 divisors (see below), whose sum is σ = 1792500892. Its totient is φ = 1536429312.

The previous prime is 1664465059. The next prime is 1664465111. The reversal of 1664465101 is 1015644661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 287980900 + 1376484201 = 16970^2 + 37101^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664465101 - 2¹³ = 1664456909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664465111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64017876 + ... + 64017901.

It is an arithmetic number, because the mean of its divisors is an integer number (448125223).

Almost surely, 2^1664465101 is an apocalyptic number.

It is an amenable number.

1664465101 is a deficient number, since it is larger than the sum of its proper divisors (128035791).

1664465101 is a wasteful number, since it uses less digits than its factorization.

1664465101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128035790.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1664465101 is about 40797.8565735995. The cubic root of 1664465101 is about 1185.1088225176.

The spelling of 1664465101 in words is "one billion, six hundred sixty-four million, four hundred sixty-five thousand, one hundred one".