665676467111 has 4 divisors (see below), whose sum is σ = 667816906224. Its totient is φ = 663536028000.

The previous prime is 665676467101. The next prime is 665676467143. The reversal of 665676467111 is 111764676566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111764676566 = 2 ⋅55882338283.

It is a cyclic number.

It is not a de Polignac number, because 665676467111 - 2¹⁴ = 665676450727 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 (665676467101) 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, 1070219090 + ... + 1070219711.

It is an arithmetic number, because the mean of its divisors is an integer number (166954226556).

Almost surely, 2^665676467111 is an apocalyptic number.

665676467111 is a deficient number, since it is larger than the sum of its proper divisors (2140439113).

665676467111 is a wasteful number, since it uses less digits than its factorization.

665676467111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140439112.

The product of its digits is 7620480, while the sum is 56.

The spelling of 665676467111 in words is "six hundred sixty-five billion, six hundred seventy-six million, four hundred sixty-seven thousand, one hundred eleven".