1666426300 has 216 divisors, whose sum is σ = 4702199040. Its totient is φ = 506620800.

The previous prime is 1666426277. The next prime is 1666426319. The reversal of 1666426300 is 36246661.

It is a super-2 number, since 2×1666426300² = 5553953226663380000, which contains 22 as substring.

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 71 ways as a sum of consecutive naturals, for example, 2317341 + ... + 2318059.

It is an arithmetic number, because the mean of its divisors is an integer number (21769440).

Almost surely, 2^1666426300 is an apocalyptic number.

1666426300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666426300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2351099520).

1666426300 is an abundant number, since it is smaller than the sum of its proper divisors (3035772740).

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

1666426300 is a wasteful number, since it uses less digits than its factorization.

1666426300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 1666426300 is about 40821.8850618146. The cubic root of 1666426300 is about 1185.5741015173.

The spelling of 1666426300 in words is "one billion, six hundred sixty-six million, four hundred twenty-six thousand, three hundred".