671111755 has 4 divisors (see below), whose sum is σ = 805334112. Its totient is φ = 536889400.

The previous prime is 671111741. The next prime is 671111783. The reversal of 671111755 is 557111176.

It is a happy number.

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

It is not a de Polignac number, because 671111755 - 2⁷ = 671111627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671111755.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67111171 + ... + 67111180.

It is an arithmetic number, because the mean of its divisors is an integer number (201333528).

Almost surely, 2^671111755 is an apocalyptic number.

671111755 is a deficient number, since it is larger than the sum of its proper divisors (134222357).

671111755 is a wasteful number, since it uses less digits than its factorization.

671111755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134222356.

The product of its digits is 7350, while the sum is 34.

The square root of 671111755 is about 25905.8247311295. The cubic root of 671111755 is about 875.5177365886.

The spelling of 671111755 in words is "six hundred seventy-one million, one hundred eleven thousand, seven hundred fifty-five".