2066728379904 has 200 divisors, whose sum is σ = 6436844734320. Its totient is φ = 658956570624.

The previous prime is 2066728379851. The next prime is 2066728379957. The reversal of 2066728379904 is 4099738276602.

2066728379904 is a `hidden beast` number, since 206 + 67 + 283 + 7 + 9 + 90 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (2066728379851) and next prime (2066728379957).

It is a super-2 number, since 2×2066728379904² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 129499 + ... + 2037210.

Almost surely, 2^{2066728379904} is an apocalyptic number.

2066728379904 is a gapful number since it is divisible by the number (24) 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 2066728379904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3218422367160).

2066728379904 is an abundant number, since it is smaller than the sum of its proper divisors (4370116354416).

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

2066728379904 is an equidigital number, since it uses as much as digits as its factorization.

2066728379904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166762 (or 2166737 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 2066728379904 in words is "two trillion, sixty-six billion, seven hundred twenty-eight million, three hundred seventy-nine thousand, nine hundred four".