672186091567 has 4 divisors (see below), whose sum is σ = 672188151960. Its totient is φ = 672184031176.

The previous prime is 672186091553. The next prime is 672186091583. The reversal of 672186091567 is 765190681276.

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

It is a cyclic number.

It is not a de Polignac number, because 672186091567 - 2⁷ = 672186091439 is a prime.

It is a super-2 number, since 2×672186091567² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672186091597) 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, 420592 + ... + 1233397.

It is an arithmetic number, because the mean of its divisors is an integer number (168047037990).

Almost surely, 2^672186091567 is an apocalyptic number.

672186091567 is a deficient number, since it is larger than the sum of its proper divisors (2060393).

672186091567 is a wasteful number, since it uses less digits than its factorization.

672186091567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060392.

The product of its (nonzero) digits is 7620480, while the sum is 58.

The spelling of 672186091567 in words is "six hundred seventy-two billion, one hundred eighty-six million, ninety-one thousand, five hundred sixty-seven".