66952541 has 2 divisors, whose sum is σ = 66952542. Its totient is φ = 66952540.

The previous prime is 66952513. The next prime is 66952553. The reversal of 66952541 is 14525966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48246916 + 18705625 = 6946^2 + 4325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66952541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66952495 and 66952504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66952141) 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, 33476270 + 33476271.

It is an arithmetic number, because the mean of its divisors is an integer number (33476271).

Almost surely, 2^66952541 is an apocalyptic number.

It is an amenable number.

66952541 is a deficient number, since it is larger than the sum of its proper divisors (1).

66952541 is an equidigital number, since it uses as much as digits as its factorization.

66952541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 38.

The square root of 66952541 is about 8182.4532384854. The cubic root of 66952541 is about 406.0588883819.

The spelling of 66952541 in words is "sixty-six million, nine hundred fifty-two thousand, five hundred forty-one".