663051047 has 4 divisors (see below), whose sum is σ = 663537456. Its totient is φ = 662564640.

The previous prime is 663051031. The next prime is 663051121. The reversal of 663051047 is 740150366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740150366 = 2 ⋅370075183.

It is a cyclic number.

It is not a de Polignac number, because 663051047 - 2⁴ = 663051031 is a prime.

It is a super-3 number, since 3×663051047³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663051007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241154 + ... + 243887.

It is an arithmetic number, because the mean of its divisors is an integer number (165884364).

Almost surely, 2^663051047 is an apocalyptic number.

663051047 is a deficient number, since it is larger than the sum of its proper divisors (486409).

663051047 is a wasteful number, since it uses less digits than its factorization.

663051047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486408.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 663051047 is about 25749.7776106902. Note that the first 3 decimals coincide. The cubic root of 663051047 is about 871.9983337335.

The spelling of 663051047 in words is "six hundred sixty-three million, fifty-one thousand, forty-seven".