63662321 has 4 divisors (see below), whose sum is σ = 66430272. Its totient is φ = 60894372.

The previous prime is 63662309. The next prime is 63662327. The reversal of 63662321 is 12326636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63662321 - 2⁶ = 63662257 is a prime.

It is a super-2 number, since 2×63662321² = 8105782230214082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63662327) 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, 1383941 + ... + 1383986.

It is an arithmetic number, because the mean of its divisors is an integer number (16607568).

Almost surely, 2^63662321 is an apocalyptic number.

It is an amenable number.

63662321 is a deficient number, since it is larger than the sum of its proper divisors (2767951).

63662321 is a wasteful number, since it uses less digits than its factorization.

63662321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767950.

The product of its digits is 7776, while the sum is 29.

The square root of 63662321 is about 7978.8671501661. The cubic root of 63662321 is about 399.2952611705.

Adding to 63662321 its reverse (12326636), we get a palindrome (75988957).

It can be divided in two parts, 636 and 62321, that multiplied together give a triangular number (39636156 = T₈₉₀₃).

The spelling of 63662321 in words is "sixty-three million, six hundred sixty-two thousand, three hundred twenty-one".