1664940603 has 8 divisors (see below), whose sum is σ = 2221177168. Its totient is φ = 1109332224.

The previous prime is 1664940593. The next prime is 1664940619. The reversal of 1664940603 is 3060494661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1664940603 - 2¹³ = 1664932411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664920603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150826 + ... + 161487.

It is an arithmetic number, because the mean of its divisors is an integer number (277647146).

Almost surely, 2^1664940603 is an apocalyptic number.

1664940603 is a deficient number, since it is larger than the sum of its proper divisors (556236565).

1664940603 is a wasteful number, since it uses less digits than its factorization.

1664940603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314093.

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 1664940603 is about 40803.6836940000. The cubic root of 1664940603 is about 1185.2216651682.

The spelling of 1664940603 in words is "one billion, six hundred sixty-four million, nine hundred forty thousand, six hundred three".