667406666598 has 64 divisors (see below), whose sum is σ = 1547393960448. Its totient is φ = 187967635200.

The previous prime is 667406666573. The next prime is 667406666609. The reversal of 667406666598 is 895666604766.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 616386 + ... + 1309482.

It is an arithmetic number, because the mean of its divisors is an integer number (24178030632).

Almost surely, 2^667406666598 is an apocalyptic number.

667406666598 is an abundant number, since it is smaller than the sum of its proper divisors (879987293850).

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

667406666598 is a wasteful number, since it uses less digits than its factorization.

667406666598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693437.

The product of its (nonzero) digits is 470292480, while the sum is 69.

The spelling of 667406666598 in words is "six hundred sixty-seven billion, four hundred six million, six hundred sixty-six thousand, five hundred ninety-eight".