1664226363 has 4 divisors (see below), whose sum is σ = 2218968488. Its totient is φ = 1109484240.

The previous prime is 1664226353. The next prime is 1664226379. The reversal of 1664226363 is 3636224661.

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

It is not a de Polignac number, because 1664226363 - 2⁵ = 1664226331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664226313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277371058 + ... + 277371063.

It is an arithmetic number, because the mean of its divisors is an integer number (554742122).

Almost surely, 2^1664226363 is an apocalyptic number.

1664226363 is a deficient number, since it is larger than the sum of its proper divisors (554742125).

1664226363 is an equidigital number, since it uses as much as digits as its factorization.

1664226363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554742124.

The product of its digits is 186624, while the sum is 39.

The square root of 1664226363 is about 40794.9306041817. The cubic root of 1664226363 is about 1185.0521588607.

The spelling of 1664226363 in words is "one billion, six hundred sixty-four million, two hundred twenty-six thousand, three hundred sixty-three".