63780606 has 48 divisors (see below), whose sum is σ = 146240640. Its totient is φ = 20034000.

The previous prime is 63780601. The next prime is 63780623. The reversal of 63780606 is 60608736.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63780601) 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, 85471 + ... + 86213.

It is an arithmetic number, because the mean of its divisors is an integer number (3046680).

Almost surely, 2^63780606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63780606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73120320).

63780606 is an abundant number, since it is smaller than the sum of its proper divisors (82460034).

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

63780606 is a wasteful number, since it uses less digits than its factorization.

63780606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 63780606 is about 7986.2761034164. The cubic root of 63780606 is about 399.5424058854.

The spelling of 63780606 in words is "sixty-three million, seven hundred eighty thousand, six hundred six".