671742669 has 16 divisors (see below), whose sum is σ = 1006492032. Its totient is φ = 395406528.

The previous prime is 671742661. The next prime is 671742679. The reversal of 671742669 is 966247176.

671742669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 671742669 - 2³ = 671742661 is a prime.

It is a super-2 number, since 2×671742669² = 902476426710487122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671742661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373542 + ... + 375335.

It is an arithmetic number, because the mean of its divisors is an integer number (62905752).

Almost surely, 2^671742669 is an apocalyptic number.

671742669 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

671742669 is a deficient number, since it is larger than the sum of its proper divisors (334749363).

671742669 is a wasteful number, since it uses less digits than its factorization.

671742669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748916.

The product of its digits is 762048, while the sum is 48.

The square root of 671742669 is about 25917.9989389613. The cubic root of 671742669 is about 875.7920095328.

The spelling of 671742669 in words is "six hundred seventy-one million, seven hundred forty-two thousand, six hundred sixty-nine".