667615460072741 has 4 divisors (see below), whose sum is σ = 690636682833900. Its totient is φ = 644594237311584.

The previous prime is 667615460072723. The next prime is 667615460072747. The reversal of 667615460072741 is 147270064516766.

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 489979076391841 + 177636383680900 = 22135471^2 + 13328030^2 .

It is a cyclic number.

It is not a de Polignac number, because 667615460072741 - 2¹⁴ = 667615460056357 is a prime.

It is a super-2 number, since 2×667615460072741² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667615460072747) 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, 11510611380536 + ... + 11510611380593.

It is an arithmetic number, because the mean of its divisors is an integer number (172659170708475).

Almost surely, 2^{667615460072741} is an apocalyptic number.

It is an amenable number.

667615460072741 is a deficient number, since it is larger than the sum of its proper divisors (23021222761159).

667615460072741 is a wasteful number, since it uses less digits than its factorization.

667615460072741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23021222761158.

The product of its (nonzero) digits is 71124480, while the sum is 62.

The spelling of 667615460072741 in words is "six hundred sixty-seven trillion, six hundred fifteen billion, four hundred sixty million, seventy-two thousand, seven hundred forty-one".