354666581 has 2 divisors, whose sum is σ = 354666582. Its totient is φ = 354666580.

The previous prime is 354666569. The next prime is 354666667. The reversal of 354666581 is 185666453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295530481 + 59136100 = 17191^2 + 7690^2 .

It is a cyclic number.

It is not a de Polignac number, because 354666581 - 2⁶ = 354666517 is a prime.

It is a super-2 number, since 2×354666581² = 251576767356459122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (354666541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177333290 + 177333291.

It is an arithmetic number, because the mean of its divisors is an integer number (177333291).

Almost surely, 2^354666581 is an apocalyptic number.

It is an amenable number.

354666581 is a deficient number, since it is larger than the sum of its proper divisors (1).

354666581 is an equidigital number, since it uses as much as digits as its factorization.

354666581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 44.

The square root of 354666581 is about 18832.5935813419. The cubic root of 354666581 is about 707.8481306024.

The spelling of 354666581 in words is "three hundred fifty-four million, six hundred sixty-six thousand, five hundred eighty-one".