6690290 has 8 divisors (see below), whose sum is σ = 12042540. Its totient is φ = 2676112.

The previous prime is 6690289. The next prime is 6690319. The reversal of 6690290 is 920966.

It can be written as a sum of positive squares in 2 ways, for example, as 5755201 + 935089 = 2399^2 + 967^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334505 + ... + 334524.

Almost surely, 2^6690290 is an apocalyptic number.

6690290 is a deficient number, since it is larger than the sum of its proper divisors (5352250).

6690290 is a wasteful number, since it uses less digits than its factorization.

6690290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669036.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 6690290 is about 2586.5594909068. The cubic root of 6690290 is about 188.4292477916.

The spelling of 6690290 in words is "six million, six hundred ninety thousand, two hundred ninety".