1677666861 has 24 divisors (see below), whose sum is σ = 2611111776. Its totient is φ = 1031853600.

The previous prime is 1677666857. The next prime is 1677666877. The reversal of 1677666861 is 1686667761.

It is not a de Polignac number, because 1677666861 - 2² = 1677666857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1677666798 and 1677666807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1677666061) 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 in 23 ways as a sum of consecutive naturals, for example, 358386 + ... + 363036.

It is an arithmetic number, because the mean of its divisors is an integer number (108796324).

Almost surely, 2^1677666861 is an apocalyptic number.

It is an amenable number.

1677666861 is a deficient number, since it is larger than the sum of its proper divisors (933444915).

1677666861 is a wasteful number, since it uses less digits than its factorization.

1677666861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7753 (or 7750 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1677666861 is about 40959.3317938660. The cubic root of 1677666861 is about 1188.2338182942.

The spelling of 1677666861 in words is "one billion, six hundred seventy-seven million, six hundred sixty-six thousand, eight hundred sixty-one".