667648584426 has 8 divisors (see below), whose sum is σ = 1335297168864. Its totient is φ = 222549528140.

The previous prime is 667648584377. The next prime is 667648584433. The reversal of 667648584426 is 624485846766.

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

667648584426 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55637382030 + ... + 55637382041.

It is an arithmetic number, because the mean of its divisors is an integer number (166912146108).

Almost surely, 2^667648584426 is an apocalyptic number.

667648584426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

667648584426 is a wasteful number, since it uses less digits than its factorization.

667648584426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111274764076.

The product of its digits is 371589120, while the sum is 66.

The spelling of 667648584426 in words is "six hundred sixty-seven billion, six hundred forty-eight million, five hundred eighty-four thousand, four hundred twenty-six".