667215811552 has 48 divisors (see below), whose sum is σ = 1343359775520. Its totient is φ = 326125965312.

The previous prime is 667215811547. The next prime is 667215811573. The reversal of 667215811552 is 255118512766.

It is a junction number, because it is equal to n+sod(n) for n = 667215811496 and 667215811505.

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 7 ways as a sum of consecutive naturals, for example, 999852 + ... + 1527787.

It is an arithmetic number, because the mean of its divisors is an integer number (27986661990).

Almost surely, 2^667215811552 is an apocalyptic number.

It is an amenable number.

667215811552 is an abundant number, since it is smaller than the sum of its proper divisors (676143963968).

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

667215811552 is a wasteful number, since it uses less digits than its factorization.

667215811552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527835 (or 2527827 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 49.

The spelling of 667215811552 in words is "six hundred sixty-seven billion, two hundred fifteen million, eight hundred eleven thousand, five hundred fifty-two".