67167472561 has 4 divisors (see below), whose sum is σ = 76762825792. Its totient is φ = 57572119332.

The previous prime is 67167472543. The next prime is 67167472577. The reversal of 67167472561 is 16527476176.

It is a happy number.

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 not a de Polignac number, because 67167472561 - 2⁷ = 67167472433 is a prime.

It is a super-2 number, since 2×67167472561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67167472499 and 67167472508.

It is not an unprimeable number, because it can be changed into a prime (67167472591) 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, 4797676605 + ... + 4797676618.

It is an arithmetic number, because the mean of its divisors is an integer number (19190706448).

Almost surely, 2^67167472561 is an apocalyptic number.

It is an amenable number.

67167472561 is a deficient number, since it is larger than the sum of its proper divisors (9595353231).

67167472561 is an equidigital number, since it uses as much as digits as its factorization.

67167472561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9595353230.

The product of its digits is 2963520, while the sum is 52.

The spelling of 67167472561 in words is "sixty-seven billion, one hundred sixty-seven million, four hundred seventy-two thousand, five hundred sixty-one".