498756661 has 4 divisors (see below), whose sum is σ = 537122572. Its totient is φ = 460390752.

The previous prime is 498756649. The next prime is 498756697. The reversal of 498756661 is 166657894.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91968100 + 406788561 = 9590^2 + 20169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-498756661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 498756599 and 498756608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (498756161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19182936 + ... + 19182961.

It is an arithmetic number, because the mean of its divisors is an integer number (134280643).

Almost surely, 2^498756661 is an apocalyptic number.

It is an amenable number.

498756661 is a deficient number, since it is larger than the sum of its proper divisors (38365911).

498756661 is a wasteful number, since it uses less digits than its factorization.

498756661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38365910.

The product of its digits is 2177280, while the sum is 52.

The square root of 498756661 is about 22332.8605646478. The cubic root of 498756661 is about 793.0420873617.

The spelling of 498756661 in words is "four hundred ninety-eight million, seven hundred fifty-six thousand, six hundred sixty-one".