6699545 has 4 divisors (see below), whose sum is σ = 8039460. Its totient is φ = 5359632.

The previous prime is 6699541. The next prime is 6699577. The reversal of 6699545 is 5459966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5459966 = 2 ⋅2729983.

It can be written as a sum of positive squares in 2 ways, for example, as 687241 + 6012304 = 829^2 + 2452^2 .

It is a cyclic number.

It is not a de Polignac number, because 6699545 - 2² = 6699541 is a prime.

It is a super-3 number, since 3×6699545³ (a number of 21 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6699496 and 6699505.

It is not an unprimeable number, because it can be changed into a prime (6699541) 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 3 ways as a sum of consecutive naturals, for example, 669950 + ... + 669959.

It is an arithmetic number, because the mean of its divisors is an integer number (2009865).

Almost surely, 2^6699545 is an apocalyptic number.

It is an amenable number.

6699545 is a deficient number, since it is larger than the sum of its proper divisors (1339915).

6699545 is a wasteful number, since it uses less digits than its factorization.

6699545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339914.

The product of its digits is 291600, while the sum is 44.

The square root of 6699545 is about 2588.3479286989. The cubic root of 6699545 is about 188.5160955047.

The spelling of 6699545 in words is "six million, six hundred ninety-nine thousand, five hundred forty-five".