1664242363 has 4 divisors (see below), whose sum is σ = 1901991280. Its totient is φ = 1426493448.

The previous prime is 1664242339. The next prime is 1664242381. The reversal of 1664242363 is 3632424661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1664242363 - 2⁵ = 1664242331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1664242313) 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, 118874448 + ... + 118874461.

It is an arithmetic number, because the mean of its divisors is an integer number (475497820).

Almost surely, 2^1664242363 is an apocalyptic number.

1664242363 is a deficient number, since it is larger than the sum of its proper divisors (237748917).

1664242363 is an equidigital number, since it uses as much as digits as its factorization.

1664242363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237748916.

The product of its digits is 124416, while the sum is 37.

The square root of 1664242363 is about 40795.1267065075. The cubic root of 1664242363 is about 1185.0559565760.

The spelling of 1664242363 in words is "one billion, six hundred sixty-four million, two hundred forty-two thousand, three hundred sixty-three".