667051954660 has 384 divisors, whose sum is σ = 1828590059520. Its totient is φ = 198716184576.

The previous prime is 667051954637. The next prime is 667051954717. The reversal of 667051954660 is 66459150766.

667051954660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1098932077 + ... + 1098932683.

It is an arithmetic number, because the mean of its divisors is an integer number (4761953280).

Almost surely, 2^667051954660 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 667051954660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914295029760).

667051954660 is an abundant number, since it is smaller than the sum of its proper divisors (1161538104860).

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

667051954660 is a wasteful number, since it uses less digits than its factorization.

667051954660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 667051954660 in words is "six hundred sixty-seven billion, fifty-one million, nine hundred fifty-four thousand, six hundred sixty".