667997286 has 32 divisors (see below), whose sum is σ = 1543183488. Its totient is φ = 190515840.

The previous prime is 667997279. The next prime is 667997287. The reversal of 667997286 is 682799766.

667997286 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667997287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296560 + ... + 298803.

It is an arithmetic number, because the mean of its divisors is an integer number (48224484).

Almost surely, 2^667997286 is an apocalyptic number.

667997286 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

667997286 is an abundant number, since it is smaller than the sum of its proper divisors (875186202).

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

667997286 is a wasteful number, since it uses less digits than its factorization.

667997286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595396.

The product of its digits is 13716864, while the sum is 60.

The square root of 667997286 is about 25845.6434626805. The cubic root of 667997286 is about 874.1612800133.

The spelling of 667997286 in words is "six hundred sixty-seven million, nine hundred ninety-seven thousand, two hundred eighty-six".