6684020545 has 16 divisors (see below), whose sum is σ = 8549856000. Its totient is φ = 5001654528.

The previous prime is 6684020537. The next prime is 6684020573. The reversal of 6684020545 is 5450204866.

It is a cyclic number.

It is not a de Polignac number, because 6684020545 - 2³ = 6684020537 is a prime.

It is a super-2 number, since 2×6684020545² = 89352261291964194050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6684020498 and 6684020507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437800 + ... + 452809.

It is an arithmetic number, because the mean of its divisors is an integer number (534366000).

Almost surely, 2^6684020545 is an apocalyptic number.

It is an amenable number.

6684020545 is a deficient number, since it is larger than the sum of its proper divisors (1865835455).

6684020545 is a wasteful number, since it uses less digits than its factorization.

6684020545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890712.

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 6684020545 is about 81755.8593924619. The cubic root of 6684020545 is about 1883.7037052846.

The spelling of 6684020545 in words is "six billion, six hundred eighty-four million, twenty thousand, five hundred forty-five".