668053787 has 2 divisors, whose sum is σ = 668053788. Its totient is φ = 668053786.

The previous prime is 668053703. The next prime is 668053823. The reversal of 668053787 is 787350866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668053787 - 2¹⁸ = 667791643 is a prime.

It is not a weakly prime, because it can be changed into another prime (668053187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334026893 + 334026894.

It is an arithmetic number, because the mean of its divisors is an integer number (334026894).

Almost surely, 2^668053787 is an apocalyptic number.

668053787 is a deficient number, since it is larger than the sum of its proper divisors (1).

668053787 is an equidigital number, since it uses as much as digits as its factorization.

668053787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 668053787 is about 25846.7364864503. The cubic root of 668053787 is about 874.1859256194.

The spelling of 668053787 in words is "six hundred sixty-eight million, fifty-three thousand, seven hundred eighty-seven".