76770257 has 2 divisors, whose sum is σ = 76770258. Its totient is φ = 76770256.

The previous prime is 76770209. The next prime is 76770271. The reversal of 76770257 is 75207767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76720081 + 50176 = 8759^2 + 224^2 .

It is a cyclic number.

It is not a de Polignac number, because 76770257 - 2¹⁶ = 76704721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76770157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38385128 + 38385129.

It is an arithmetic number, because the mean of its divisors is an integer number (38385129).

Almost surely, 2^76770257 is an apocalyptic number.

It is an amenable number.

76770257 is a deficient number, since it is larger than the sum of its proper divisors (1).

76770257 is an equidigital number, since it uses as much as digits as its factorization.

76770257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144060, while the sum is 41.

The square root of 76770257 is about 8761.8637857479. The cubic root of 76770257 is about 425.0085479250.

The spelling of 76770257 in words is "seventy-six million, seven hundred seventy thousand, two hundred fifty-seven".