661341502 has 8 divisors (see below), whose sum is σ = 1008826200. Its totient is φ = 325066104.

The previous prime is 661341487. The next prime is 661341509. The reversal of 661341502 is 205143166.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661341509) 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, 2802177 + ... + 2802412.

It is an arithmetic number, because the mean of its divisors is an integer number (126103275).

Almost surely, 2^661341502 is an apocalyptic number.

661341502 is a deficient number, since it is larger than the sum of its proper divisors (347484698).

661341502 is a wasteful number, since it uses less digits than its factorization.

661341502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604650.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 661341502 is about 25716.5608509381. The cubic root of 661341502 is about 871.2482640811.

Adding to 661341502 its reverse (205143166), we get a palindrome (866484668).

The spelling of 661341502 in words is "six hundred sixty-one million, three hundred forty-one thousand, five hundred two".