1664975414 has 4 divisors (see below), whose sum is σ = 2497463124. Its totient is φ = 832487706.

The previous prime is 1664975407. The next prime is 1664975467. The reversal of 1664975414 is 4145794661.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416243852 + ... + 416243855.

It is an arithmetic number, because the mean of its divisors is an integer number (624365781).

Almost surely, 2^1664975414 is an apocalyptic number.

1664975414 is a deficient number, since it is larger than the sum of its proper divisors (832487710).

1664975414 is an equidigital number, since it uses as much as digits as its factorization.

1664975414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832487709.

The product of its digits is 725760, while the sum is 47.

The square root of 1664975414 is about 40804.1102586492. The cubic root of 1664975414 is about 1185.2299254156.

The spelling of 1664975414 in words is "one billion, six hundred sixty-four million, nine hundred seventy-five thousand, four hundred fourteen".