676961861 has 4 divisors (see below), whose sum is σ = 685118112. Its totient is φ = 668805612.

The previous prime is 676961851. The next prime is 676961899. The reversal of 676961861 is 168169676.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 676961861 - 2⁶ = 676961797 is a prime.

It is a super-2 number, since 2×676961861² = 916554722497166642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676961851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4078001 + ... + 4078166.

It is an arithmetic number, because the mean of its divisors is an integer number (171279528).

Almost surely, 2^676961861 is an apocalyptic number.

It is an amenable number.

676961861 is a deficient number, since it is larger than the sum of its proper divisors (8156251).

676961861 is an equidigital number, since it uses as much as digits as its factorization.

676961861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8156250.

The product of its digits is 653184, while the sum is 50.

The square root of 676961861 is about 26018.4907517711. The cubic root of 676961861 is about 878.0543537109.

The spelling of 676961861 in words is "six hundred seventy-six million, nine hundred sixty-one thousand, eight hundred sixty-one".