667156319808 has 112 divisors (see below), whose sum is σ = 1926092257536. Its totient is φ = 202122754560.

The previous prime is 667156319771. The next prime is 667156319813. The reversal of 667156319808 is 808913651766.

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 15 ways as a sum of consecutive naturals, for example, 9941535 + ... + 10008417.

Almost surely, 2^667156319808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667156319808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963046128768).

667156319808 is an abundant number, since it is smaller than the sum of its proper divisors (1258935937728).

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

667156319808 is a wasteful number, since it uses less digits than its factorization.

667156319808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71632 (or 71622 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 667156319808 in words is "six hundred sixty-seven billion, one hundred fifty-six million, three hundred nineteen thousand, eight hundred eight".