667726355352 has 64 divisors (see below), whose sum is σ = 1911582650880. Its totient is φ = 190399652352.

The previous prime is 667726355339. The next prime is 667726355363. The reversal of 667726355352 is 253553627766.

It is a junction number, because it is equal to n+sod(n) for n = 667726355292 and 667726355301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3866353 + ... + 4035360.

It is an arithmetic number, because the mean of its divisors is an integer number (29868478920).

Almost surely, 2^667726355352 is an apocalyptic number.

It is an amenable number.

667726355352 is an abundant number, since it is smaller than the sum of its proper divisors (1243856295528).

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

667726355352 is a wasteful number, since it uses less digits than its factorization.

667726355352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7902232 (or 7902228 counting only the distinct ones).

The product of its digits is 47628000, while the sum is 57.

It can be divided in two parts, 6677263 and 55352, that added together give a triangular number (6732615 = T₃₆₆₉).

The spelling of 667726355352 in words is "six hundred sixty-seven billion, seven hundred twenty-six million, three hundred fifty-five thousand, three hundred fifty-two".