667519 has 2 divisors, whose sum is σ = 667520. Its totient is φ = 667518.

The previous prime is 667507. The next prime is 667531. The reversal of 667519 is 915766.

It is a balanced prime because it is at equal distance from previous prime (667507) and next prime (667531).

It is a cyclic number.

It is not a de Polignac number, because 667519 - 2⁵ = 667487 is a prime.

It is a super-2 number, since 2×667519² = 891163230722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333759 + 333760.

It is an arithmetic number, because the mean of its divisors is an integer number (333760).

2⁶⁶⁷⁵¹⁹ is an apocalyptic number.

667519 is a deficient number, since it is larger than the sum of its proper divisors (1).

667519 is an equidigital number, since it uses as much as digits as its factorization.

667519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 34.

The square root of 667519 is about 817.0183596468. The cubic root of 667519 is about 87.3952597066.

The spelling of 667519 in words is "six hundred sixty-seven thousand, five hundred nineteen".