666457037 has 2 divisors, whose sum is σ = 666457038. Its totient is φ = 666457036.

The previous prime is 666457013. The next prime is 666457067. The reversal of 666457037 is 730754666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 664299076 + 2157961 = 25774^2 + 1469^2 .

It is a cyclic number.

It is not a de Polignac number, because 666457037 - 2¹⁰ = 666456013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666457007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333228518 + 333228519.

It is an arithmetic number, because the mean of its divisors is an integer number (333228519).

Almost surely, 2^666457037 is an apocalyptic number.

It is an amenable number.

666457037 is a deficient number, since it is larger than the sum of its proper divisors (1).

666457037 is an equidigital number, since it uses as much as digits as its factorization.

666457037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 44.

The square root of 666457037 is about 25815.8291945078. The cubic root of 666457037 is about 873.4888909465.

The spelling of 666457037 in words is "six hundred sixty-six million, four hundred fifty-seven thousand, thirty-seven".