663062491 has 16 divisors (see below), whose sum is σ = 818992384. Its totient is φ = 522746784.

The previous prime is 663062479. The next prime is 663062557. The reversal of 663062491 is 194260366.

It is a happy number.

It is not a de Polignac number, because 663062491 - 2⁷ = 663062363 is a prime.

It is a super-2 number, since 2×663062491² = 879303733942250162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 663062491.

It is not an unprimeable number, because it can be changed into a prime (663062461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12880 + ... + 38626.

It is an arithmetic number, because the mean of its divisors is an integer number (51187024).

Almost surely, 2^663062491 is an apocalyptic number.

663062491 is a deficient number, since it is larger than the sum of its proper divisors (155929893).

663062491 is a wasteful number, since it uses less digits than its factorization.

663062491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26050.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 663062491 is about 25749.9998252427. Note that the first 3 decimals coincide. The cubic root of 663062491 is about 872.0033504872.

The spelling of 663062491 in words is "six hundred sixty-three million, sixty-two thousand, four hundred ninety-one".