58166621 has 2 divisors, whose sum is σ = 58166622. Its totient is φ = 58166620.

The previous prime is 58166617. The next prime is 58166629. The reversal of 58166621 is 12666185.

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., 51638596 + 6528025 = 7186^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 58166621 - 2² = 58166617 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (58166629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29083310 + 29083311.

It is an arithmetic number, because the mean of its divisors is an integer number (29083311).

Almost surely, 2^58166621 is an apocalyptic number.

It is an amenable number.

58166621 is a deficient number, since it is larger than the sum of its proper divisors (1).

58166621 is an equidigital number, since it uses as much as digits as its factorization.

58166621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 58166621 is about 7626.7044652327. The cubic root of 58166621 is about 387.4579817082.

It can be divided in two parts, 581 and 66621, that multiplied together give a triangular number (38706801 = T₈₇₉₈).

The spelling of 58166621 in words is "fifty-eight million, one hundred sixty-six thousand, six hundred twenty-one".