6690993 has 4 divisors (see below), whose sum is σ = 8921328. Its totient is φ = 4460660.

The previous prime is 6690991. The next prime is 6690997. The reversal of 6690993 is 3990966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6690993 - 2¹ = 6690991 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6690991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115163 + ... + 1115168.

It is an arithmetic number, because the mean of its divisors is an integer number (2230332).

Almost surely, 2^6690993 is an apocalyptic number.

It is an amenable number.

6690993 is a deficient number, since it is larger than the sum of its proper divisors (2230335).

6690993 is a wasteful number, since it uses less digits than its factorization.

6690993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230334.

The product of its (nonzero) digits is 78732, while the sum is 42.

The square root of 6690993 is about 2586.6953821430. The cubic root of 6690993 is about 188.4358474618.

The spelling of 6690993 in words is "six million, six hundred ninety thousand, nine hundred ninety-three".