66354877 has 2 divisors, whose sum is σ = 66354878. Its totient is φ = 66354876.

The previous prime is 66354863. The next prime is 66354889. The reversal of 66354877 is 77845366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66243321 + 111556 = 8139^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 66354877 - 2⁷ = 66354749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66354817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33177438 + 33177439.

It is an arithmetic number, because the mean of its divisors is an integer number (33177439).

Almost surely, 2^66354877 is an apocalyptic number.

It is an amenable number.

66354877 is a deficient number, since it is larger than the sum of its proper divisors (1).

66354877 is an equidigital number, since it uses as much as digits as its factorization.

66354877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 46.

The square root of 66354877 is about 8145.8502932475. The cubic root of 66354877 is about 404.8470224457.

The spelling of 66354877 in words is "sixty-six million, three hundred fifty-four thousand, eight hundred seventy-seven".