166747449929 has 2 divisors, whose sum is σ = 166747449930. Its totient is φ = 166747449928.

The previous prime is 166747449923. The next prime is 166747449937. The reversal of 166747449929 is 929944747661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101327622400 + 65419827529 = 318320^2 + 255773^2 .

It is an emirp because it is prime and its reverse (929944747661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166747449929 is a prime.

It is not a weakly prime, because it can be changed into another prime (166747449923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83373724964 + 83373724965.

It is an arithmetic number, because the mean of its divisors is an integer number (83373724965).

Almost surely, 2^166747449929 is an apocalyptic number.

It is an amenable number.

166747449929 is a deficient number, since it is larger than the sum of its proper divisors (1).

166747449929 is an equidigital number, since it uses as much as digits as its factorization.

166747449929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164602368, while the sum is 68.

The spelling of 166747449929 in words is "one hundred sixty-six billion, seven hundred forty-seven million, four hundred forty-nine thousand, nine hundred twenty-nine".