63996705 has 24 divisors (see below), whose sum is σ = 113024808. Its totient is φ = 33486336.

The previous prime is 63996701. The next prime is 63996727. The reversal of 63996705 is 50769936.

63996705 = T₂₀₂ + T₂₀₃ + ... + T₇₃₁.

63996705 is a `hidden beast` number, since 639 + 9 + 6 + 7 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2405601 + 61591104 = 1551^2 + 7848^2 .

It is not a de Polignac number, because 63996705 - 2² = 63996701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (63996701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11032 + ... + 15801.

It is an arithmetic number, because the mean of its divisors is an integer number (4709367).

Almost surely, 2^63996705 is an apocalyptic number.

It is an amenable number.

63996705 is a deficient number, since it is larger than the sum of its proper divisors (49028103).

63996705 is a wasteful number, since it uses less digits than its factorization.

63996705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26897 (or 26894 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 63996705 is about 7999.7940598493. The cubic root of 63996705 is about 399.9931352989.

It can be divided in two parts, 639 and 96705, that added together give a square (97344 = 312²).

The spelling of 63996705 in words is "sixty-three million, nine hundred ninety-six thousand, seven hundred five".