1664498331 has 24 divisors (see below), whose sum is σ = 2443256816. Its totient is φ = 1091750400.

The previous prime is 1664498323. The next prime is 1664498357. The reversal of 1664498331 is 1338944661.

It is not a de Polignac number, because 1664498331 - 2³ = 1664498323 is a prime.

It is a super-2 number, since 2×1664498331² = 5541109387803571122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1664491331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281556 + ... + 287406.

Almost surely, 2^1664498331 is an apocalyptic number.

1664498331 is a deficient number, since it is larger than the sum of its proper divisors (778758485).

1664498331 is a wasteful number, since it uses less digits than its factorization.

1664498331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6363 (or 6360 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 1664498331 is about 40798.2638233541. The cubic root of 1664498331 is about 1185.1167091161.

The spelling of 1664498331 in words is "one billion, six hundred sixty-four million, four hundred ninety-eight thousand, three hundred thirty-one".