66150481 has 2 divisors, whose sum is σ = 66150482. Its totient is φ = 66150480.

The previous prime is 66150473. The next prime is 66150493. The reversal of 66150481 is 18405166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51710481 + 14440000 = 7191^2 + 3800^2 .

It is a cyclic number.

It is not a de Polignac number, because 66150481 - 2³ = 66150473 is a prime.

It is a super-2 number, since 2×66150481² = 8751772273062722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66150781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33075240 + 33075241.

It is an arithmetic number, because the mean of its divisors is an integer number (33075241).

Almost surely, 2^66150481 is an apocalyptic number.

It is an amenable number.

66150481 is a deficient number, since it is larger than the sum of its proper divisors (1).

66150481 is an equidigital number, since it uses as much as digits as its factorization.

66150481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 66150481 is about 8133.2945969023. The cubic root of 66150481 is about 404.4309052149.

The spelling of 66150481 in words is "sixty-six million, one hundred fifty thousand, four hundred eighty-one".