663121465 has 32 divisors (see below), whose sum is σ = 873400320. Its totient is φ = 481152000.

The previous prime is 663121439. The next prime is 663121471. The reversal of 663121465 is 564121366.

It is not a de Polignac number, because 663121465 - 2¹³ = 663113273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663121465.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 945615 + ... + 946315.

It is an arithmetic number, because the mean of its divisors is an integer number (27293760).

Almost surely, 2^663121465 is an apocalyptic number.

It is an amenable number.

663121465 is a deficient number, since it is larger than the sum of its proper divisors (210278855).

663121465 is a wasteful number, since it uses less digits than its factorization.

663121465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113.

The product of its digits is 25920, while the sum is 34.

The square root of 663121465 is about 25751.1449260028. The cubic root of 663121465 is about 872.0292022492.

Subtracting from 663121465 its reverse (564121366), we obtain a palindrome (99000099).

The spelling of 663121465 in words is "six hundred sixty-three million, one hundred twenty-one thousand, four hundred sixty-five".