261376677 has 6 divisors (see below), whose sum is σ = 377544102. Its totient is φ = 174251112.

The previous prime is 261376663. The next prime is 261376679. The reversal of 261376677 is 776673162.

261376677 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., 141276996 + 120099681 = 11886^2 + 10959^2 .

It is not a de Polignac number, because 261376677 - 2⁶ = 261376613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261376679) 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, 14520918 + ... + 14520935.

It is an arithmetic number, because the mean of its divisors is an integer number (62924017).

Almost surely, 2^261376677 is an apocalyptic number.

It is an amenable number.

261376677 is a deficient number, since it is larger than the sum of its proper divisors (116167425).

261376677 is a wasteful number, since it uses less digits than its factorization.

261376677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29041859 (or 29041856 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The square root of 261376677 is about 16167.1480787429. The cubic root of 261376677 is about 639.3749406753.

The spelling of 261376677 in words is "two hundred sixty-one million, three hundred seventy-six thousand, six hundred seventy-seven".