670263637 has 2 divisors, whose sum is σ = 670263638. Its totient is φ = 670263636.

The previous prime is 670263619. The next prime is 670263647. The reversal of 670263637 is 736362076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 454585041 + 215678596 = 21321^2 + 14686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670263637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 670263637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670263647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335131818 + 335131819.

It is an arithmetic number, because the mean of its divisors is an integer number (335131819).

Almost surely, 2^670263637 is an apocalyptic number.

It is an amenable number.

670263637 is a deficient number, since it is larger than the sum of its proper divisors (1).

670263637 is an equidigital number, since it uses as much as digits as its factorization.

670263637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 40.

The square root of 670263637 is about 25889.4503031640. The cubic root of 670263637 is about 875.1487690447.

The spelling of 670263637 in words is "six hundred seventy million, two hundred sixty-three thousand, six hundred thirty-seven".