66012577 has 2 divisors, whose sum is σ = 66012578. Its totient is φ = 66012576.

The previous prime is 66012559. The next prime is 66012589. The reversal of 66012577 is 77521066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64657681 + 1354896 = 8041^2 + 1164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66012577 is a prime.

It is not a weakly prime, because it can be changed into another prime (66052577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33006288 + 33006289.

It is an arithmetic number, because the mean of its divisors is an integer number (33006289).

Almost surely, 2^66012577 is an apocalyptic number.

It is an amenable number.

66012577 is a deficient number, since it is larger than the sum of its proper divisors (1).

66012577 is an equidigital number, since it uses as much as digits as its factorization.

66012577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 66012577 is about 8124.8124286041. The cubic root of 66012577 is about 404.1496704701.

The spelling of 66012577 in words is "sixty-six million, twelve thousand, five hundred seventy-seven".