6667833385 has 4 divisors (see below), whose sum is σ = 8001400068. Its totient is φ = 5334266704.

The previous prime is 6667833371. The next prime is 6667833391. The reversal of 6667833385 is 5833387666.

6667833385 = T₆₆₆₇₁ + T₆₆₆₇₂ + T₆₆₆₇₃.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4679654464 + 1988178921 = 68408^2 + 44589^2 .

It is a cyclic number.

It is not a de Polignac number, because 6667833385 - 2¹⁷ = 6667702313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666783334 + ... + 666783343.

It is an arithmetic number, because the mean of its divisors is an integer number (2000350017).

Almost surely, 2^6667833385 is an apocalyptic number.

6667833385 is the 66673-rd centered triangular number.

It is an amenable number.

6667833385 is a deficient number, since it is larger than the sum of its proper divisors (1333566683).

6667833385 is a wasteful number, since it uses less digits than its factorization.

6667833385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333566682.

The product of its digits is 13063680, while the sum is 55.

The square root of 6667833385 is about 81656.8024416827. The cubic root of 6667833385 is about 1882.1818437566.

The spelling of 6667833385 in words is "six billion, six hundred sixty-seven million, eight hundred thirty-three thousand, three hundred eighty-five".