6645020673 has 8 divisors (see below), whose sum is σ = 9381205728. Its totient is φ = 4169424704.

The previous prime is 6645020663. The next prime is 6645020731. The reversal of 6645020673 is 3760205466.

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

It is a cyclic number.

It is not a de Polignac number, because 6645020673 - 2¹⁶ = 6644955137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6645020663) 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, 65147211 + ... + 65147312.

It is an arithmetic number, because the mean of its divisors is an integer number (1172650716).

Almost surely, 2^6645020673 is an apocalyptic number.

It is an amenable number.

6645020673 is a deficient number, since it is larger than the sum of its proper divisors (2736185055).

6645020673 is a wasteful number, since it uses less digits than its factorization.

6645020673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130294543.

The product of its (nonzero) digits is 181440, while the sum is 39.

The square root of 6645020673 is about 81516.9962216469. The cubic root of 6645020673 is about 1880.0328831769.

The spelling of 6645020673 in words is "six billion, six hundred forty-five million, twenty thousand, six hundred seventy-three".