663055645 has 8 divisors (see below), whose sum is σ = 909333504. Its totient is φ = 454666704.

The previous prime is 663055633. The next prime is 663055663. The reversal of 663055645 is 546550366.

It is a happy number.

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 663055645 - 2¹¹ = 663053597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663055598 and 663055607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9472189 + ... + 9472258.

It is an arithmetic number, because the mean of its divisors is an integer number (113666688).

Almost surely, 2^663055645 is an apocalyptic number.

It is an amenable number.

663055645 is a deficient number, since it is larger than the sum of its proper divisors (246277859).

663055645 is a wasteful number, since it uses less digits than its factorization.

663055645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18944459.

The product of its (nonzero) digits is 324000, while the sum is 40.

The square root of 663055645 is about 25749.8668928599. The cubic root of 663055645 is about 872.0003493847. Note that the first 3 decimals are identical.

The spelling of 663055645 in words is "six hundred sixty-three million, fifty-five thousand, six hundred forty-five".