667400340007 has 4 divisors (see below), whose sum is σ = 667410627856. Its totient is φ = 667390052160.

The previous prime is 667400339989. The next prime is 667400340011. The reversal of 667400340007 is 700043004766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667400340007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667400340067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5045994 + ... + 5176567.

It is an arithmetic number, because the mean of its divisors is an integer number (166852656964).

Almost surely, 2^667400340007 is an apocalyptic number.

667400340007 is a deficient number, since it is larger than the sum of its proper divisors (10287849).

667400340007 is a wasteful number, since it uses less digits than its factorization.

667400340007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10287848.

The product of its (nonzero) digits is 84672, while the sum is 37.

The spelling of 667400340007 in words is "six hundred sixty-seven billion, four hundred million, three hundred forty thousand, seven".