166667020349 has 2 divisors, whose sum is σ = 166667020350. Its totient is φ = 166667020348.

The previous prime is 166667020343. The next prime is 166667020367. The reversal of 166667020349 is 943020766661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138268704025 + 28398316324 = 371845^2 + 168518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166667020349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166667020297 and 166667020306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166667020343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83333510174 + 83333510175.

It is an arithmetic number, because the mean of its divisors is an integer number (83333510175).

Almost surely, 2^166667020349 is an apocalyptic number.

It is an amenable number.

166667020349 is a deficient number, since it is larger than the sum of its proper divisors (1).

166667020349 is an equidigital number, since it uses as much as digits as its factorization.

166667020349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 166667020349 in words is "one hundred sixty-six billion, six hundred sixty-seven million, twenty thousand, three hundred forty-nine".