166735691747 has 2 divisors, whose sum is σ = 166735691748. Its totient is φ = 166735691746.

The previous prime is 166735691713. The next prime is 166735691779. The reversal of 166735691747 is 747196537661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166735691747 - 2²⁰ = 166734643171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166735691747.

It is not a weakly prime, because it can be changed into another prime (166735690747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83367845873 + 83367845874.

It is an arithmetic number, because the mean of its divisors is an integer number (83367845874).

Almost surely, 2^166735691747 is an apocalyptic number.

166735691747 is a deficient number, since it is larger than the sum of its proper divisors (1).

166735691747 is an equidigital number, since it uses as much as digits as its factorization.

166735691747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40007520, while the sum is 62.

The spelling of 166735691747 in words is "one hundred sixty-six billion, seven hundred thirty-five million, six hundred ninety-one thousand, seven hundred forty-seven".