663546457 has 8 divisors (see below), whose sum is σ = 758499200. Its totient is φ = 568633824.

The previous prime is 663546439. The next prime is 663546461. The reversal of 663546457 is 754645366.

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 663546457 - 2²⁷ = 529328729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663576457) 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, 47269 + ... + 59677.

It is an arithmetic number, because the mean of its divisors is an integer number (94812400).

Almost surely, 2^663546457 is an apocalyptic number.

It is an amenable number.

663546457 is a deficient number, since it is larger than the sum of its proper divisors (94952743).

663546457 is a wasteful number, since it uses less digits than its factorization.

663546457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20055.

The product of its digits is 1814400, while the sum is 46.

The square root of 663546457 is about 25759.3955092118. The cubic root of 663546457 is about 872.2154558539.

The spelling of 663546457 in words is "six hundred sixty-three million, five hundred forty-six thousand, four hundred fifty-seven".