667437406734 has 48 divisors (see below), whose sum is σ = 1552953403008. Its totient is φ = 190679228208.

The previous prime is 667437406717. The next prime is 667437406763. The reversal of 667437406734 is 437604734766.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3367869 + ... + 3560535.

It is an arithmetic number, because the mean of its divisors is an integer number (32353195896).

Almost surely, 2^667437406734 is an apocalyptic number.

667437406734 is an abundant number, since it is smaller than the sum of its proper divisors (885515996274).

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

667437406734 is a wasteful number, since it uses less digits than its factorization.

667437406734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204469 (or 204462 counting only the distinct ones).

The product of its (nonzero) digits is 42674688, while the sum is 57.

The spelling of 667437406734 in words is "six hundred sixty-seven billion, four hundred thirty-seven million, four hundred six thousand, seven hundred thirty-four".