671166023649 has 32 divisors (see below), whose sum is σ = 1024020430848. Its totient is φ = 387044592000.

The previous prime is 671166023641. The next prime is 671166023699. The reversal of 671166023649 is 946320661176.

It is not a de Polignac number, because 671166023649 - 2³ = 671166023641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671166023641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2169892 + ... + 2459829.

It is an arithmetic number, because the mean of its divisors is an integer number (32000638464).

Almost surely, 2^671166023649 is an apocalyptic number.

671166023649 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

671166023649 is a deficient number, since it is larger than the sum of its proper divisors (352854407199).

671166023649 is a wasteful number, since it uses less digits than its factorization.

671166023649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629949.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 671166023649 in words is "six hundred seventy-one billion, one hundred sixty-six million, twenty-three thousand, six hundred forty-nine".