506761681 has 8 divisors (see below), whose sum is σ = 535868928. Its totient is φ = 478452000.

The previous prime is 506761663. The next prime is 506761699. The reversal of 506761681 is 186167605.

It is an interprime number because it is at equal distance from previous prime (506761663) and next prime (506761699).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 506761681 - 2⁵ = 506761649 is a prime.

It is a super-2 number, since 2×506761681² = 513614802659891522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506761181) 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, 198085 + ... + 200626.

It is an arithmetic number, because the mean of its divisors is an integer number (66983616).

Almost surely, 2^506761681 is an apocalyptic number.

It is an amenable number.

506761681 is a deficient number, since it is larger than the sum of its proper divisors (29107247).

506761681 is a wasteful number, since it uses less digits than its factorization.

506761681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398783.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 506761681 is about 22511.3678171718. The cubic root of 506761681 is about 797.2623511390.

The spelling of 506761681 in words is "five hundred six million, seven hundred sixty-one thousand, six hundred eighty-one".