63638066 has 16 divisors (see below), whose sum is σ = 96496920. Its totient is φ = 31474560.

The previous prime is 63638063. The next prime is 63638119. The reversal of 63638066 is 66083636.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 34164025 + 29474041 = 5845^2 + 5429^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63638063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121886 + ... + 122406.

Almost surely, 2^63638066 is an apocalyptic number.

63638066 is a deficient number, since it is larger than the sum of its proper divisors (32858854).

63638066 is a wasteful number, since it uses less digits than its factorization.

63638066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 63638066 is about 7977.3470527488. The cubic root of 63638066 is about 399.2445449507.

The spelling of 63638066 in words is "sixty-three million, six hundred thirty-eight thousand, sixty-six".