671350081 has 4 divisors (see below), whose sum is σ = 672059952. Its totient is φ = 670640212.

The previous prime is 671350037. The next prime is 671350091. The reversal of 671350081 is 180053176.

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 671350081 - 2²⁷ = 537132353 is a prime.

It is a super-2 number, since 2×671350081² = 901421862517413122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671350091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353515 + ... + 355408.

It is an arithmetic number, because the mean of its divisors is an integer number (168014988).

Almost surely, 2^671350081 is an apocalyptic number.

It is an amenable number.

671350081 is a deficient number, since it is larger than the sum of its proper divisors (709871).

671350081 is an equidigital number, since it uses as much as digits as its factorization.

671350081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709870.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 671350081 is about 25910.4241763812. The cubic root of 671350081 is about 875.6213626209.

The spelling of 671350081 in words is "six hundred seventy-one million, three hundred fifty thousand, eighty-one".