671741551 has 8 divisors (see below), whose sum is σ = 728696304. Its totient is φ = 615541440.

The previous prime is 671741537. The next prime is 671741569. The reversal of 671741551 is 155147176.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671741551 - 2⁹ = 671741039 is a prime.

It is a super-2 number, since 2×671741551² = 902473422679771202, which contains 22 as substring.

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 671741551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671741051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186805 + ... + 190366.

It is an arithmetic number, because the mean of its divisors is an integer number (91087038).

Almost surely, 2^671741551 is an apocalyptic number.

671741551 is a deficient number, since it is larger than the sum of its proper divisors (56954753).

671741551 is a wasteful number, since it uses less digits than its factorization.

671741551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377321.

The product of its digits is 29400, while the sum is 37.

The square root of 671741551 is about 25917.9773709292. The cubic root of 671741551 is about 875.7915236642.

The spelling of 671741551 in words is "six hundred seventy-one million, seven hundred forty-one thousand, five hundred fifty-one".