671999052697 has 8 divisors (see below), whose sum is σ = 813175324416. Its totient is φ = 542116882752.

The previous prime is 671999052661. The next prime is 671999052719. The reversal of 671999052697 is 796250999176.

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 671999052697 - 2²³ = 671990664089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (671999052497) 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, 2823525313 + ... + 2823525550.

It is an arithmetic number, because the mean of its divisors is an integer number (101646915552).

Almost surely, 2^671999052697 is an apocalyptic number.

It is an amenable number.

671999052697 is a deficient number, since it is larger than the sum of its proper divisors (141176271719).

671999052697 is a wasteful number, since it uses less digits than its factorization.

671999052697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5647050887.

The product of its (nonzero) digits is 115736040, while the sum is 70.

The spelling of 671999052697 in words is "six hundred seventy-one billion, nine hundred ninety-nine million, fifty-two thousand, six hundred ninety-seven".