63315665 has 16 divisors (see below), whose sum is σ = 90609408. Its totient is φ = 41528256.

The previous prime is 63315643. The next prime is 63315677. The reversal of 63315665 is 56651336.

It is not a de Polignac number, because 63315665 - 2¹⁴ = 63299281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38522 + ... + 40131.

It is an arithmetic number, because the mean of its divisors is an integer number (5663088).

Almost surely, 2^63315665 is an apocalyptic number.

It is an amenable number.

63315665 is a deficient number, since it is larger than the sum of its proper divisors (27293743).

63315665 is a wasteful number, since it uses less digits than its factorization.

63315665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78688.

The product of its digits is 48600, while the sum is 35.

The square root of 63315665 is about 7957.1141125411. The cubic root of 63315665 is about 398.5691901437.

The spelling of 63315665 in words is "sixty-three million, three hundred fifteen thousand, six hundred sixty-five".