667672469 has 2 divisors, whose sum is σ = 667672470. Its totient is φ = 667672468.

The previous prime is 667672373. The next prime is 667672477. The reversal of 667672469 is 964276766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667602244 + 70225 = 25838^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 667672469 - 2¹² = 667668373 is a prime.

It is a super-2 number, since 2×667672469² = 891573051721111922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667672469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667672669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333836234 + 333836235.

It is an arithmetic number, because the mean of its divisors is an integer number (333836235).

Almost surely, 2^667672469 is an apocalyptic number.

It is an amenable number.

667672469 is a deficient number, since it is larger than the sum of its proper divisors (1).

667672469 is an equidigital number, since it uses as much as digits as its factorization.

667672469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4572288, while the sum is 53.

The square root of 667672469 is about 25839.3589123260. The cubic root of 667672469 is about 874.0195686193.

The spelling of 667672469 in words is "six hundred sixty-seven million, six hundred seventy-two thousand, four hundred sixty-nine".