670577581 has 4 divisors (see below), whose sum is σ = 699733152. Its totient is φ = 641422012.

The previous prime is 670577569. The next prime is 670577617. The reversal of 670577581 is 185775076.

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 670577581 - 2⁹ = 670577069 is a prime.

It is a super-2 number, since 2×670577581² = 899348584279623122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670577521) 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, 14577751 + ... + 14577796.

It is an arithmetic number, because the mean of its divisors is an integer number (174933288).

Almost surely, 2^670577581 is an apocalyptic number.

It is an amenable number.

670577581 is a deficient number, since it is larger than the sum of its proper divisors (29155571).

670577581 is a wasteful number, since it uses less digits than its factorization.

670577581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29155570.

The product of its (nonzero) digits is 411600, while the sum is 46.

The square root of 670577581 is about 25895.5127580050. The cubic root of 670577581 is about 875.2853843529.

The spelling of 670577581 in words is "six hundred seventy million, five hundred seventy-seven thousand, five hundred eighty-one".