63620766 has 96 divisors (see below), whose sum is σ = 163459296. Its totient is φ = 17664000.

The previous prime is 63620747. The next prime is 63620771. The reversal of 63620766 is 66702636.

It is a self number, because there is not a number n which added to its sum of digits gives 63620766.

It is a congruent number.

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, 137776 + ... + 138236.

It is an arithmetic number, because the mean of its divisors is an integer number (1702701).

Almost surely, 2^63620766 is an apocalyptic number.

63620766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 63620766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81729648).

63620766 is an abundant number, since it is smaller than the sum of its proper divisors (99838530).

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

63620766 is a wasteful number, since it uses less digits than its factorization.

63620766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 63620766 is about 7976.2626586641. The cubic root of 63620766 is about 399.2083634793.

The spelling of 63620766 in words is "sixty-three million, six hundred twenty thousand, seven hundred sixty-six".