667248481 has 2 divisors, whose sum is σ = 667248482. Its totient is φ = 667248480.

The previous prime is 667248467. The next prime is 667248497. The reversal of 667248481 is 184842766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666672400 + 576081 = 25820^2 + 759^2 .

It is a cyclic number.

It is not a de Polignac number, because 667248481 - 2¹³ = 667240289 is a prime.

It is a super-2 number, since 2×667248481² = 890441070793614722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (667248401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333624240 + 333624241.

It is an arithmetic number, because the mean of its divisors is an integer number (333624241).

Almost surely, 2^667248481 is an apocalyptic number.

It is an amenable number.

667248481 is a deficient number, since it is larger than the sum of its proper divisors (1).

667248481 is an equidigital number, since it uses as much as digits as its factorization.

667248481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 516096, while the sum is 46.

The square root of 667248481 is about 25831.1533037145. The cubic root of 667248481 is about 873.8345216615.

The spelling of 667248481 in words is "six hundred sixty-seven million, two hundred forty-eight thousand, four hundred eighty-one".