661043310 has 16 divisors (see below), whose sum is σ = 1586504016. Its totient is φ = 176278208.

The previous prime is 661043309. The next prime is 661043353. The reversal of 661043310 is 13340166.

It is a super-2 number, since 2×661043310² = 873956515391512200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11017359 + ... + 11017418.

It is an arithmetic number, because the mean of its divisors is an integer number (99156501).

Almost surely, 2^661043310 is an apocalyptic number.

661043310 is an abundant number, since it is smaller than the sum of its proper divisors (925460706).

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

661043310 is a wasteful number, since it uses less digits than its factorization.

661043310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22034787.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 661043310 is about 25710.7625324493. The cubic root of 661043310 is about 871.1172988041.

Adding to 661043310 its reverse (13340166), we get a palindrome (674383476).

The spelling of 661043310 in words is "six hundred sixty-one million, forty-three thousand, three hundred ten".