67681086 has 32 divisors (see below), whose sum is σ = 150097536. Its totient is φ = 20172000.

The previous prime is 67681073. The next prime is 67681087. The reversal of 67681086 is 68018676.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67681087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4380 + ... + 12431.

It is an arithmetic number, because the mean of its divisors is an integer number (4690548).

Almost surely, 2^67681086 is an apocalyptic number.

67681086 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

67681086 is an abundant number, since it is smaller than the sum of its proper divisors (82416450).

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

67681086 is a wasteful number, since it uses less digits than its factorization.

67681086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16888.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 67681086 is about 8226.8515241251. The cubic root of 67681086 is about 407.5264233183.

The spelling of 67681086 in words is "sixty-seven million, six hundred eighty-one thousand, eighty-six".