63661352040 has 192 divisors, whose sum is σ = 243070813440. Its totient is φ = 14245885440.

The previous prime is 63661352039. The next prime is 63661352077. The reversal of 63661352040 is 4025316636.

63661352040 is a `hidden beast` number, since 6 + 36 + 61 + 3 + 520 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 63661351986 and 63661352004.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 566832 + ... + 669791.

It is an arithmetic number, because the mean of its divisors is an integer number (1265993820).

Almost surely, 2^63661352040 is an apocalyptic number.

63661352040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63661352040 is an abundant number, since it is smaller than the sum of its proper divisors (179409461400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63661352040 is a wasteful number, since it uses less digits than its factorization.

63661352040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236664 (or 1236657 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 63661352040 its reverse (4025316636), we get a palindrome (67686668676).

The spelling of 63661352040 in words is "sixty-three billion, six hundred sixty-one million, three hundred fifty-two thousand, forty".