666672337 has 2 divisors, whose sum is σ = 666672338. Its totient is φ = 666672336.

The previous prime is 666672317. The next prime is 666672407. The reversal of 666672337 is 733276666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562448656 + 104223681 = 23716^2 + 10209^2 .

It is a cyclic number.

It is not a de Polignac number, because 666672337 - 2¹¹ = 666670289 is a prime.

It is not a weakly prime, because it can be changed into another prime (666672317) 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, 333336168 + 333336169.

It is an arithmetic number, because the mean of its divisors is an integer number (333336169).

Almost surely, 2^666672337 is an apocalyptic number.

It is an amenable number.

666672337 is a deficient number, since it is larger than the sum of its proper divisors (1).

666672337 is an equidigital number, since it uses as much as digits as its factorization.

666672337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 46.

The square root of 666672337 is about 25819.9987800155. The cubic root of 666672337 is about 873.5829414755.

It can be divided in two parts, 6666 and 72337, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 666672337 in words is "six hundred sixty-six million, six hundred seventy-two thousand, three hundred thirty-seven".