66953077 has 2 divisors, whose sum is σ = 66953078. Its totient is φ = 66953076.

The previous prime is 66953059. The next prime is 66953101. The reversal of 66953077 is 77035966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37075921 + 29877156 = 6089^2 + 5466^2 .

It is a cyclic number.

It is not a de Polignac number, because 66953077 - 2¹¹ = 66951029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66953057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33476538 + 33476539.

It is an arithmetic number, because the mean of its divisors is an integer number (33476539).

Almost surely, 2^66953077 is an apocalyptic number.

It is an amenable number.

66953077 is a deficient number, since it is larger than the sum of its proper divisors (1).

66953077 is an equidigital number, since it uses as much as digits as its factorization.

66953077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 66953077 is about 8182.4859914332. The cubic root of 66953077 is about 406.0599719703.

The spelling of 66953077 in words is "sixty-six million, nine hundred fifty-three thousand, seventy-seven".