677440871 has 4 divisors (see below), whose sum is σ = 717290352. Its totient is φ = 637591392.

The previous prime is 677440849. The next prime is 677440913. The reversal of 677440871 is 178044776.

It is a happy number.

677440871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-677440871 is a prime.

It is a super-2 number, since 2×677440871² = 917852267402477282, 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 (677440811) 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, 19924715 + ... + 19924748.

It is an arithmetic number, because the mean of its divisors is an integer number (179322588).

Almost surely, 2^677440871 is an apocalyptic number.

677440871 is a deficient number, since it is larger than the sum of its proper divisors (39849481).

677440871 is a wasteful number, since it uses less digits than its factorization.

677440871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39849480.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 677440871 is about 26027.6943081787. The cubic root of 677440871 is about 878.2614050856.

The spelling of 677440871 in words is "six hundred seventy-seven million, four hundred forty thousand, eight hundred seventy-one".