11667619567 has 4 divisors (see below), whose sum is σ = 11952195696. Its totient is φ = 11383043440.

The previous prime is 11667619559. The next prime is 11667619583. The reversal of 11667619567 is 76591676611.

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 11667619567 - 2³ = 11667619559 is a prime.

It is a super-2 number, since 2×11667619567² (a number of 21 digits) 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 (11667619867) 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, 142288003 + ... + 142288084.

It is an arithmetic number, because the mean of its divisors is an integer number (2988048924).

Almost surely, 2^11667619567 is an apocalyptic number.

11667619567 is a deficient number, since it is larger than the sum of its proper divisors (284576129).

11667619567 is an equidigital number, since it uses as much as digits as its factorization.

11667619567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284576128.

The product of its digits is 2857680, while the sum is 55.

The spelling of 11667619567 in words is "eleven billion, six hundred sixty-seven million, six hundred nineteen thousand, five hundred sixty-seven".