662668429 has 2 divisors, whose sum is σ = 662668430. Its totient is φ = 662668428.

The previous prime is 662668427. The next prime is 662668451. The reversal of 662668429 is 924866266.

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., 609349225 + 53319204 = 24685^2 + 7302^2 .

It is a cyclic number.

It is not a de Polignac number, because 662668429 - 2¹ = 662668427 is a prime.

It is a super-3 number, since 3×662668429³ (a number of 27 digits) contains 333 as substring.

Together with 662668427, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662668423) 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, 331334214 + 331334215.

It is an arithmetic number, because the mean of its divisors is an integer number (331334215).

Almost surely, 2^662668429 is an apocalyptic number.

It is an amenable number.

662668429 is a deficient number, since it is larger than the sum of its proper divisors (1).

662668429 is an equidigital number, since it uses as much as digits as its factorization.

662668429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 49.

The square root of 662668429 is about 25742.3469986713. The cubic root of 662668429 is about 871.8305706543.

The spelling of 662668429 in words is "six hundred sixty-two million, six hundred sixty-eight thousand, four hundred twenty-nine".