667745877210 has 128 divisors (see below), whose sum is σ = 1666311575040. Its totient is φ = 171120230400.

The previous prime is 667745877193. The next prime is 667745877223. The reversal of 667745877210 is 12778547766.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 119901306 + ... + 119906874.

It is an arithmetic number, because the mean of its divisors is an integer number (13018059180).

Almost surely, 2^667745877210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667745877210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (833155787520).

667745877210 is an abundant number, since it is smaller than the sum of its proper divisors (998565697830).

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

667745877210 is a wasteful number, since it uses less digits than its factorization.

667745877210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064.

The product of its (nonzero) digits is 27659520, while the sum is 60.

The spelling of 667745877210 in words is "six hundred sixty-seven billion, seven hundred forty-five million, eight hundred seventy-seven thousand, two hundred ten".