677355271681 has 4 divisors (see below), whose sum is σ = 738933023664. Its totient is φ = 615777519700.

The previous prime is 677355271679. The next prime is 677355271709. The reversal of 677355271681 is 186172553776.

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 677355271681 - 2¹ = 677355271679 is a prime.

It is a super-3 number, since 3×677355271681³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (677355271081) 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, 30788875975 + ... + 30788875996.

It is an arithmetic number, because the mean of its divisors is an integer number (184733255916).

Almost surely, 2^677355271681 is an apocalyptic number.

It is an amenable number.

677355271681 is a deficient number, since it is larger than the sum of its proper divisors (61577751983).

677355271681 is a wasteful number, since it uses less digits than its factorization.

677355271681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61577751982.

The product of its digits is 14817600, while the sum is 58.

The spelling of 677355271681 in words is "six hundred seventy-seven billion, three hundred fifty-five million, two hundred seventy-one thousand, six hundred eighty-one".