663415 has 8 divisors (see below), whose sum is σ = 800640. Its totient is φ = 527712.

The previous prime is 663409. The next prime is 663437. The reversal of 663415 is 514366.

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 663415 - 2³ = 663407 is a prime.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 663415.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1146 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (100080).

2⁶⁶³⁴¹⁵ is an apocalyptic number.

663415 is a deficient number, since it is larger than the sum of its proper divisors (137225).

663415 is a wasteful number, since it uses less digits than its factorization.

663415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761.

The product of its digits is 2160, while the sum is 25.

The square root of 663415 is about 814.5029158941. The cubic root of 663415 is about 87.2157853055.

It can be divided in two parts, 66341 and 5, that multiplied together give a triangular number (331705 = T₈₁₄).

The spelling of 663415 in words is "six hundred sixty-three thousand, four hundred fifteen".