1664972830 has 8 divisors (see below), whose sum is σ = 2996951112. Its totient is φ = 665989128.

The previous prime is 1664972821. The next prime is 1664972833. The reversal of 1664972830 is 382794661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664972833) 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 3 ways as a sum of consecutive naturals, for example, 83248632 + ... + 83248651.

It is an arithmetic number, because the mean of its divisors is an integer number (374618889).

Almost surely, 2^1664972830 is an apocalyptic number.

1664972830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1664972830 is a deficient number, since it is larger than the sum of its proper divisors (1331978282).

1664972830 is a wasteful number, since it uses less digits than its factorization.

1664972830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166497290.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1664972830 is about 40804.0785951601. The cubic root of 1664972830 is about 1185.2293122663.

The spelling of 1664972830 in words is "one billion, six hundred sixty-four million, nine hundred seventy-two thousand, eight hundred thirty".