1664727363 has 64 divisors (see below), whose sum is σ = 2831713920. Its totient is φ = 957505536.

The previous prime is 1664727343. The next prime is 1664727367. The reversal of 1664727363 is 3637274661.

1664727363 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1664727363 - 2⁶ = 1664727299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1664727367) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 935931 + ... + 937707.

It is an arithmetic number, because the mean of its divisors is an integer number (44245530).

Almost surely, 2^1664727363 is an apocalyptic number.

1664727363 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1664727363 is a deficient number, since it is larger than the sum of its proper divisors (1166986557).

1664727363 is a wasteful number, since it uses less digits than its factorization.

1664727363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1967 counting only the distinct ones).

The product of its digits is 762048, while the sum is 45.

The square root of 1664727363 is about 40801.0706109533. The cubic root of 1664727363 is about 1185.1710632713.

The spelling of 1664727363 in words is "one billion, six hundred sixty-four million, seven hundred twenty-seven thousand, three hundred sixty-three".