11666061497 has 2 divisors, whose sum is σ = 11666061498. Its totient is φ = 11666061496.

The previous prime is 11666061481. The next prime is 11666061523. The reversal of 11666061497 is 79416066611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10651065616 + 1014995881 = 103204^2 + 31859^2 .

It is a cyclic number.

It is not a de Polignac number, because 11666061497 - 2⁴ = 11666061481 is a prime.

It is not a weakly prime, because it can be changed into another prime (11666061697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833030748 + 5833030749.

It is an arithmetic number, because the mean of its divisors is an integer number (5833030749).

Almost surely, 2^11666061497 is an apocalyptic number.

It is an amenable number.

11666061497 is a deficient number, since it is larger than the sum of its proper divisors (1).

11666061497 is an equidigital number, since it uses as much as digits as its factorization.

11666061497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 11666061497 in words is "eleven billion, six hundred sixty-six million, sixty-one thousand, four hundred ninety-seven".