672087571081 has 4 divisors (see below), whose sum is σ = 672111964672. Its totient is φ = 672063177492.

The previous prime is 672087571061. The next prime is 672087571091. The reversal of 672087571081 is 180175780276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 672087571081 - 2⁵ = 672087571049 is a prime.

It is a super-2 number, since 2×672087571081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672087571031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12155421 + ... + 12210586.

It is an arithmetic number, because the mean of its divisors is an integer number (168027991168).

Almost surely, 2^672087571081 is an apocalyptic number.

It is an amenable number.

672087571081 is a deficient number, since it is larger than the sum of its proper divisors (24393591).

672087571081 is a wasteful number, since it uses less digits than its factorization.

672087571081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24393590.

The product of its (nonzero) digits is 1317120, while the sum is 52.

The spelling of 672087571081 in words is "six hundred seventy-two billion, eighty-seven million, five hundred seventy-one thousand, eighty-one".