667407371 has 2 divisors, whose sum is σ = 667407372. Its totient is φ = 667407370.

The previous prime is 667407361. The next prime is 667407373. The reversal of 667407371 is 173704766.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667407371 is a prime.

Together with 667407373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (667407373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333703685 + 333703686.

It is an arithmetic number, because the mean of its divisors is an integer number (333703686).

Almost surely, 2^667407371 is an apocalyptic number.

667407371 is a deficient number, since it is larger than the sum of its proper divisors (1).

667407371 is an equidigital number, since it uses as much as digits as its factorization.

667407371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 148176, while the sum is 41.

The square root of 667407371 is about 25834.2286705061. The cubic root of 667407371 is about 873.9038774071.

The spelling of 667407371 in words is "six hundred sixty-seven million, four hundred seven thousand, three hundred seventy-one".