6645456003 has 16 divisors (see below), whose sum is σ = 9112849920. Its totient is φ = 4304519136.

The previous prime is 6645455983. The next prime is 6645456023. The reversal of 6645456003 is 3006545466.

It is an interprime number because it is at equal distance from previous prime (6645455983) and next prime (6645456023).

It is not a de Polignac number, because 6645456003 - 2¹³ = 6645447811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6645456023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38176 + ... + 121442.

It is an arithmetic number, because the mean of its divisors is an integer number (569553120).

Almost surely, 2^6645456003 is an apocalyptic number.

6645456003 is a deficient number, since it is larger than the sum of its proper divisors (2467393917).

6645456003 is a wasteful number, since it uses less digits than its factorization.

6645456003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84026.

The product of its (nonzero) digits is 259200, while the sum is 39.

The square root of 6645456003 is about 81519.6663572662. Note that the first 3 decimals coincide. The cubic root of 6645456003 is about 1880.0739373177.

The spelling of 6645456003 in words is "six billion, six hundred forty-five million, four hundred fifty-six thousand, three".