677406161 has 2 divisors, whose sum is σ = 677406162. Its totient is φ = 677406160.

The previous prime is 677406137. The next prime is 677406167. The reversal of 677406161 is 161604776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 636048400 + 41357761 = 25220^2 + 6431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677406161 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (677406167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338703080 + 338703081.

It is an arithmetic number, because the mean of its divisors is an integer number (338703081).

Almost surely, 2^677406161 is an apocalyptic number.

It is an amenable number.

677406161 is a deficient number, since it is larger than the sum of its proper divisors (1).

677406161 is an equidigital number, since it uses as much as digits as its factorization.

677406161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 677406161 is about 26027.0275098790. The cubic root of 677406161 is about 878.2464050193.

The spelling of 677406161 in words is "six hundred seventy-seven million, four hundred six thousand, one hundred sixty-one".