667041007 has 2 divisors, whose sum is σ = 667041008. Its totient is φ = 667041006.

The previous prime is 667040971. The next prime is 667041031. The reversal of 667041007 is 700140766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667041007 - 2¹¹ = 667038959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667041007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667041097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333520503 + 333520504.

It is an arithmetic number, because the mean of its divisors is an integer number (333520504).

Almost surely, 2^667041007 is an apocalyptic number.

667041007 is a deficient number, since it is larger than the sum of its proper divisors (1).

667041007 is an equidigital number, since it uses as much as digits as its factorization.

667041007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 667041007 is about 25827.1370267786. The cubic root of 667041007 is about 873.7439423432.

The spelling of 667041007 in words is "six hundred sixty-seven million, forty-one thousand, seven".