667648888346 has 16 divisors (see below), whose sum is σ = 1102184653248. Its totient is φ = 300791131200.

The previous prime is 667648888343. The next prime is 667648888349. The reversal of 667648888346 is 643888846766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (667648888343) and next prime (667648888349).

It is not an unprimeable number, because it can be changed into a prime (667648888343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134279270 + ... + 134284241.

It is an arithmetic number, because the mean of its divisors is an integer number (68886540828).

Almost surely, 2^667648888346 is an apocalyptic number.

667648888346 is a deficient number, since it is larger than the sum of its proper divisors (434535764902).

667648888346 is a wasteful number, since it uses less digits than its factorization.

667648888346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268563637.

The product of its digits is 1783627776, while the sum is 74.

The spelling of 667648888346 in words is "six hundred sixty-seven billion, six hundred forty-eight million, eight hundred eighty-eight thousand, three hundred forty-six".