2006685381 has 8 divisors (see below), whose sum is σ = 2679718464. Its totient is φ = 1335721280.

The previous prime is 2006685367. The next prime is 2006685413. The reversal of 2006685381 is 1835866002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2006685381 - 2¹⁴ = 2006668997 is a prime.

It is a super-2 number, since 2×2006685381² = 8053572436638230322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2006681381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514980 + ... + 518861.

It is an arithmetic number, because the mean of its divisors is an integer number (334964808).

Almost surely, 2^2006685381 is an apocalyptic number.

It is an amenable number.

2006685381 is a deficient number, since it is larger than the sum of its proper divisors (673033083).

2006685381 is a wasteful number, since it uses less digits than its factorization.

2006685381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034491.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 2006685381 is about 44796.0420238217. The cubic root of 2006685381 is about 1261.3233306315.

The spelling of 2006685381 in words is "two billion, six million, six hundred eighty-five thousand, three hundred eighty-one".