501748866 has 12 divisors (see below), whose sum is σ = 1087122582. Its totient is φ = 167249616.

The previous prime is 501748859. The next prime is 501748867. The reversal of 501748866 is 668847105.

It is a happy number.

501748866 is a `hidden beast` number, since 501 + 7 + 4 + 88 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 493506225 + 8242641 = 22215^2 + 2871^2 .

It is not an unprimeable number, because it can be changed into a prime (501748867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13937451 + ... + 13937486.

Almost surely, 2^501748866 is an apocalyptic number.

501748866 is an abundant number, since it is smaller than the sum of its proper divisors (585373716).

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

501748866 is a wasteful number, since it uses less digits than its factorization.

501748866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27874945 (or 27874942 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 501748866 is about 22399.7514718356. The cubic root of 501748866 is about 794.6248330702.

The spelling of 501748866 in words is "five hundred one million, seven hundred forty-eight thousand, eight hundred sixty-six".