66677827 has 2 divisors, whose sum is σ = 66677828. Its totient is φ = 66677826.

The previous prime is 66677813. The next prime is 66677839. The reversal of 66677827 is 72877666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66677827 - 2²³ = 58289219 is a prime.

It is a super-2 number, since 2×66677827² = 8891865226883858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66677887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33338913 + 33338914.

It is an arithmetic number, because the mean of its divisors is an integer number (33338914).

Almost surely, 2^66677827 is an apocalyptic number.

66677827 is a deficient number, since it is larger than the sum of its proper divisors (1).

66677827 is an equidigital number, since it uses as much as digits as its factorization.

66677827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 49.

The square root of 66677827 is about 8165.6492087280. The cubic root of 66677827 is about 405.5027582430.

The spelling of 66677827 in words is "sixty-six million, six hundred seventy-seven thousand, eight hundred twenty-seven".