6664292477 has 2 divisors, whose sum is σ = 6664292478. Its totient is φ = 6664292476.

The previous prime is 6664292461. The next prime is 6664292489. The reversal of 6664292477 is 7742924666.

6664292477 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5826421561 + 837870916 = 76331^2 + 28946^2 .

It is a cyclic number.

It is not a de Polignac number, because 6664292477 - 2⁴ = 6664292461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6664292447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332146238 + 3332146239.

It is an arithmetic number, because the mean of its divisors is an integer number (3332146239).

Almost surely, 2^6664292477 is an apocalyptic number.

It is an amenable number.

6664292477 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664292477 is an equidigital number, since it uses as much as digits as its factorization.

6664292477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 53.

The square root of 6664292477 is about 81635.1179150248. The cubic root of 6664292477 is about 1881.8486114332.

The spelling of 6664292477 in words is "six billion, six hundred sixty-four million, two hundred ninety-two thousand, four hundred seventy-seven".