677106981 has 6 divisors (see below), whose sum is σ = 978043430. Its totient is φ = 451404648.

The previous prime is 677106979. The next prime is 677107007. The reversal of 677106981 is 189601776.

677106981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 407030625 + 270076356 = 20175^2 + 16434^2 .

It is not a de Polignac number, because 677106981 - 2¹ = 677106979 is a prime.

It is a super-2 number, since 2×677106981² = 916947727437868722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677101981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37617046 + ... + 37617063.

Almost surely, 2^677106981 is an apocalyptic number.

It is an amenable number.

677106981 is a deficient number, since it is larger than the sum of its proper divisors (300936449).

677106981 is a wasteful number, since it uses less digits than its factorization.

677106981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75234115 (or 75234112 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 677106981 is about 26021.2793882238. The cubic root of 677106981 is about 878.1170919295.

It can be divided in two parts, 67710 and 6981, that added together give a triangular number (74691 = T₃₈₆).

The spelling of 677106981 in words is "six hundred seventy-seven million, one hundred six thousand, nine hundred eighty-one".