1668337020 has 96 divisors (see below), whose sum is σ = 5931878400. Its totient is φ = 381333312.

The previous prime is 1668336991. The next prime is 1668337049. The reversal of 1668337020 is 207338661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1668336991) and next prime (1668337049).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 216900 + ... + 224459.

It is an arithmetic number, because the mean of its divisors is an integer number (61790400).

Almost surely, 2^1668337020 is an apocalyptic number.

1668337020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668337020 is an abundant number, since it is smaller than the sum of its proper divisors (4263541380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668337020 is a wasteful number, since it uses less digits than its factorization.

1668337020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441384 (or 441376 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1668337020 is about 40845.2814900326. The cubic root of 1668337020 is about 1186.0270538226.

The spelling of 1668337020 in words is "one billion, six hundred sixty-eight million, three hundred thirty-seven thousand, twenty".