667994498 has 8 divisors (see below), whose sum is σ = 1060932492. Its totient is φ = 314350336.

The previous prime is 667994461. The next prime is 667994501. The reversal of 667994498 is 894499766.

It can be written as a sum of positive squares in 2 ways, for example, as 657255769 + 10738729 = 25637^2 + 3277^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 667994498.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9823415 + ... + 9823482.

Almost surely, 2^667994498 is an apocalyptic number.

667994498 is a deficient number, since it is larger than the sum of its proper divisors (392937994).

667994498 is a wasteful number, since it uses less digits than its factorization.

667994498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19646916.

The product of its digits is 23514624, while the sum is 62.

The square root of 667994498 is about 25845.5895270354. The cubic root of 667994498 is about 874.1600638581.

The spelling of 667994498 in words is "six hundred sixty-seven million, nine hundred ninety-four thousand, four hundred ninety-eight".