6690081 has 8 divisors (see below), whose sum is σ = 9161344. Its totient is φ = 4339440.

The previous prime is 6690067. The next prime is 6690107. The reversal of 6690081 is 1800966.

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

It is not a de Polignac number, because 6690081 - 2¹³ = 6681889 is a prime.

It is a super-2 number, since 2×6690081² = 89514367573122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6690001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30025 + ... + 30246.

It is an arithmetic number, because the mean of its divisors is an integer number (1145168).

Almost surely, 2^6690081 is an apocalyptic number.

It is an amenable number.

6690081 is a deficient number, since it is larger than the sum of its proper divisors (2471263).

6690081 is a wasteful number, since it uses less digits than its factorization.

6690081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60311.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 6690081 is about 2586.5190894327. The cubic root of 6690081 is about 188.4272856384.

The spelling of 6690081 in words is "six million, six hundred ninety thousand, eighty-one".