667670742399 has 16 divisors (see below), whose sum is σ = 944677843200. Its totient is φ = 418544761536.

The previous prime is 667670742377. The next prime is 667670742443. The reversal of 667670742399 is 993247076766.

It is a happy number.

It is not a de Polignac number, because 667670742399 - 2²⁴ = 667653965183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667670742329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81999214 + ... + 82007355.

It is an arithmetic number, because the mean of its divisors is an integer number (59042365200).

Almost surely, 2^667670742399 is an apocalyptic number.

667670742399 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

667670742399 is a deficient number, since it is larger than the sum of its proper divisors (277007100801).

667670742399 is a wasteful number, since it uses less digits than its factorization.

667670742399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164006654.

The product of its (nonzero) digits is 144027072, while the sum is 66.

The spelling of 667670742399 in words is "six hundred sixty-seven billion, six hundred seventy million, seven hundred forty-two thousand, three hundred ninety-nine".