674661612013 has 4 divisors (see below), whose sum is σ = 676395961020. Its totient is φ = 672927263008.

The previous prime is 674661612011. The next prime is 674661612061. The reversal of 674661612013 is 310216166476.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 454435077924 + 220226534089 = 674118^2 + 469283^2 .

It is a cyclic number.

It is not a de Polignac number, because 674661612013 - 2¹ = 674661612011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674661612011) 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, 867173920 + ... + 867174697.

It is an arithmetic number, because the mean of its divisors is an integer number (169098990255).

Almost surely, 2^674661612013 is an apocalyptic number.

It is an amenable number.

674661612013 is a deficient number, since it is larger than the sum of its proper divisors (1734349007).

674661612013 is a wasteful number, since it uses less digits than its factorization.

674661612013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734349006.

The product of its (nonzero) digits is 217728, while the sum is 43.

Adding to 674661612013 its reverse (310216166476), we get a palindrome (984877778489).

The spelling of 674661612013 in words is "six hundred seventy-four billion, six hundred sixty-one million, six hundred twelve thousand, thirteen".