11667774197 has 2 divisors, whose sum is σ = 11667774198. Its totient is φ = 11667774196.

The previous prime is 11667774143. The next prime is 11667774211. The reversal of 11667774197 is 79147776611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10492724356 + 1175049841 = 102434^2 + 34279^2 .

It is a cyclic number.

It is not a de Polignac number, because 11667774197 - 2⁶ = 11667774133 is a prime.

It is a super-2 number, since 2×11667774197² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11667774127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833887098 + 5833887099.

It is an arithmetic number, because the mean of its divisors is an integer number (5833887099).

Almost surely, 2^11667774197 is an apocalyptic number.

It is an amenable number.

11667774197 is a deficient number, since it is larger than the sum of its proper divisors (1).

11667774197 is an equidigital number, since it uses as much as digits as its factorization.

11667774197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3111696, while the sum is 56.

The spelling of 11667774197 in words is "eleven billion, six hundred sixty-seven million, seven hundred seventy-four thousand, one hundred ninety-seven".