668887079 has 8 divisors (see below), whose sum is σ = 783087648. Its totient is φ = 559347840.

The previous prime is 668887069. The next prime is 668887103. The reversal of 668887079 is 970788866.

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 668887079 - 2¹² = 668882983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668887069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165022 + ... + 1165595.

It is an arithmetic number, because the mean of its divisors is an integer number (97885956).

Almost surely, 2^668887079 is an apocalyptic number.

668887079 is a deficient number, since it is larger than the sum of its proper divisors (114200569).

668887079 is a wasteful number, since it uses less digits than its factorization.

668887079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330665.

The product of its (nonzero) digits is 8128512, while the sum is 59.

The square root of 668887079 is about 25862.8513315914. The cubic root of 668887079 is about 874.5492444049.

The spelling of 668887079 in words is "six hundred sixty-eight million, eight hundred eighty-seven thousand, seventy-nine".