66674827 has 2 divisors, whose sum is σ = 66674828. Its totient is φ = 66674826.

The previous prime is 66674809. The next prime is 66674843. The reversal of 66674827 is 72847666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66674827 is a prime.

It is not a weakly prime, because it can be changed into another prime (66674227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33337413 + 33337414.

It is an arithmetic number, because the mean of its divisors is an integer number (33337414).

Almost surely, 2^66674827 is an apocalyptic number.

66674827 is a deficient number, since it is larger than the sum of its proper divisors (1).

66674827 is an equidigital number, since it uses as much as digits as its factorization.

66674827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The square root of 66674827 is about 8165.4655103062. The cubic root of 66674827 is about 405.4966766285.

The spelling of 66674827 in words is "sixty-six million, six hundred seventy-four thousand, eight hundred twenty-seven".