6690737 has 2 divisors, whose sum is σ = 6690738. Its totient is φ = 6690736.

The previous prime is 6690721. The next prime is 6690743. The reversal of 6690737 is 7370966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6195121 + 495616 = 2489^2 + 704^2 .

It is a cyclic number.

It is not a de Polignac number, because 6690737 - 2⁴ = 6690721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6690737.

It is not a weakly prime, because it can be changed into another prime (6690767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345368 + 3345369.

It is an arithmetic number, because the mean of its divisors is an integer number (3345369).

Almost surely, 2^6690737 is an apocalyptic number.

It is an amenable number.

6690737 is a deficient number, since it is larger than the sum of its proper divisors (1).

6690737 is an equidigital number, since it uses as much as digits as its factorization.

6690737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 38.

The square root of 6690737 is about 2586.6458976829. The cubic root of 6690737 is about 188.4334442215.

The spelling of 6690737 in words is "six million, six hundred ninety thousand, seven hundred thirty-seven".