668080487 has 2 divisors, whose sum is σ = 668080488. Its totient is φ = 668080486.

The previous prime is 668080459. The next prime is 668080493. The reversal of 668080487 is 784080866.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668080487 - 2¹⁸ = 667818343 is a prime.

It is a super-2 number, since 2×668080487² = 892663074220314338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668010487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334040243 + 334040244.

It is an arithmetic number, because the mean of its divisors is an integer number (334040244).

Almost surely, 2^668080487 is an apocalyptic number.

668080487 is a deficient number, since it is larger than the sum of its proper divisors (1).

668080487 is an equidigital number, since it uses as much as digits as its factorization.

668080487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 668080487 is about 25847.2529875033. The cubic root of 668080487 is about 874.1975716145.

The spelling of 668080487 in words is "six hundred sixty-eight million, eighty thousand, four hundred eighty-seven".