6690019 has 6 divisors (see below), whose sum is σ = 7782324. Its totient is φ = 5734260.

The previous prime is 6690001. The next prime is 6690029. The reversal of 6690019 is 9100966.

It is a de Polignac number, because none of the positive numbers 2^k-6690019 is a prime.

It is a super-2 number, since 2×6690019² = 89512708440722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6690029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68217 + ... + 68314.

It is an arithmetic number, because the mean of its divisors is an integer number (1297054).

Almost surely, 2^6690019 is an apocalyptic number.

6690019 is a deficient number, since it is larger than the sum of its proper divisors (1092305).

6690019 is a wasteful number, since it uses less digits than its factorization.

6690019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136545 (or 136538 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 6690019 is about 2586.5071041851. The cubic root of 6690019 is about 188.4267035563.

The spelling of 6690019 in words is "six million, six hundred ninety thousand, nineteen".