1677342661 has 2 divisors, whose sum is σ = 1677342662. Its totient is φ = 1677342660.

The previous prime is 1677342631. The next prime is 1677342673. The reversal of 1677342661 is 1662437761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1341756900 + 335585761 = 36630^2 + 18319^2 .

It is an emirp because it is prime and its reverse (1662437761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1677342661 - 2²⁹ = 1140471749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1677342631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838671330 + 838671331.

It is an arithmetic number, because the mean of its divisors is an integer number (838671331).

Almost surely, 2^1677342661 is an apocalyptic number.

It is an amenable number.

1677342661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1677342661 is an equidigital number, since it uses as much as digits as its factorization.

1677342661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 1677342661 is about 40955.3740185583. The cubic root of 1677342661 is about 1188.1572734549.

The spelling of 1677342661 in words is "one billion, six hundred seventy-seven million, three hundred forty-two thousand, six hundred sixty-one".