814664077 has 2 divisors, whose sum is σ = 814664078. Its totient is φ = 814664076.

The previous prime is 814664041. The next prime is 814664101. The reversal of 814664077 is 770466418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 730134441 + 84529636 = 27021^2 + 9194^2 .

It is a cyclic number.

It is not a de Polignac number, because 814664077 - 2¹⁹ = 814139789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (814664377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407332038 + 407332039.

It is an arithmetic number, because the mean of its divisors is an integer number (407332039).

Almost surely, 2^814664077 is an apocalyptic number.

It is an amenable number.

814664077 is a deficient number, since it is larger than the sum of its proper divisors (1).

814664077 is an equidigital number, since it uses as much as digits as its factorization.

814664077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 814664077 is about 28542.3208061293. The cubic root of 814664077 is about 933.9555103092.

The spelling of 814664077 in words is "eight hundred fourteen million, six hundred sixty-four thousand, seventy-seven".