667467688340 has 24 divisors (see below), whose sum is σ = 1434279406560. Its totient is φ = 260778073248.

The previous prime is 667467688337. The next prime is 667467688373. The reversal of 667467688340 is 43886764766.

It is a super-2 number, since 2×667467688340² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388061750 + ... + 388063469.

It is an arithmetic number, because the mean of its divisors is an integer number (59761641940).

Almost surely, 2^667467688340 is an apocalyptic number.

It is an amenable number.

667467688340 is an abundant number, since it is smaller than the sum of its proper divisors (766811718220).

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

667467688340 is a wasteful number, since it uses less digits than its factorization.

667467688340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776125271 (or 776125269 counting only the distinct ones).

The product of its (nonzero) digits is 195084288, while the sum is 65.

The spelling of 667467688340 in words is "six hundred sixty-seven billion, four hundred sixty-seven million, six hundred eighty-eight thousand, three hundred forty".