66477770929 has 2 divisors, whose sum is σ = 66477770930. Its totient is φ = 66477770928.

The previous prime is 66477770899. The next prime is 66477770959. The reversal of 66477770929 is 92907777466.

66477770929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (66477770899) and next prime (66477770959).

It can be written as a sum of positive squares in only one way, i.e., 61082133904 + 5395637025 = 247148^2 + 73455^2 .

It is a cyclic number.

It is not a de Polignac number, because 66477770929 - 2¹⁷ = 66477639857 is a prime.

It is not a weakly prime, because it can be changed into another prime (66477770959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33238885464 + 33238885465.

It is an arithmetic number, because the mean of its divisors is an integer number (33238885465).

Almost surely, 2^66477770929 is an apocalyptic number.

It is an amenable number.

66477770929 is a deficient number, since it is larger than the sum of its proper divisors (1).

66477770929 is an equidigital number, since it uses as much as digits as its factorization.

66477770929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56010528, while the sum is 64.

The spelling of 66477770929 in words is "sixty-six billion, four hundred seventy-seven million, seven hundred seventy thousand, nine hundred twenty-nine".