667754878560 has 288 divisors, whose sum is σ = 2642324219136. Its totient is φ = 138754176000.

The previous prime is 667754878499. The next prime is 667754878577. The reversal of 667754878560 is 65878457766.

667754878560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 414666 + ... + 1227785.

It is an arithmetic number, because the mean of its divisors is an integer number (9174736872).

Almost surely, 2^667754878560 is an apocalyptic number.

667754878560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667754878560 is an abundant number, since it is smaller than the sum of its proper divisors (1974569340576).

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

667754878560 is a wasteful number, since it uses less digits than its factorization.

667754878560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642498 (or 1642479 counting only the distinct ones).

The product of its (nonzero) digits is 474163200, while the sum is 69.

The spelling of 667754878560 in words is "six hundred sixty-seven billion, seven hundred fifty-four million, eight hundred seventy-eight thousand, five hundred sixty".