61677161677 has 2 divisors, whose sum is σ = 61677161678. Its totient is φ = 61677161676.

The previous prime is 61677161659. The next prime is 61677161687. The reversal of 61677161677 is 77616177616.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46284789321 + 15392372356 = 215139^2 + 124066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61677161677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61677161687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30838580838 + 30838580839.

It is an arithmetic number, because the mean of its divisors is an integer number (30838580839).

Almost surely, 2^61677161677 is an apocalyptic number.

It is an amenable number.

61677161677 is a deficient number, since it is larger than the sum of its proper divisors (1).

61677161677 is an equidigital number, since it uses as much as digits as its factorization.

61677161677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3111696, while the sum is 55.

The spelling of 61677161677 in words is "sixty-one billion, six hundred seventy-seven million, one hundred sixty-one thousand, six hundred seventy-seven".