661007675 has 6 divisors (see below), whose sum is σ = 819649548. Its totient is φ = 528806120.

The previous prime is 661007623. The next prime is 661007681. The reversal of 661007675 is 576700166.

It is not a de Polignac number, because 661007675 - 2¹⁰ = 661006651 is a prime.

It is a super-2 number, since 2×661007675² = 873862292817811250, which contains 22 as substring.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 13220129 + ... + 13220178.

It is an arithmetic number, because the mean of its divisors is an integer number (136608258).

Almost surely, 2^661007675 is an apocalyptic number.

661007675 is a deficient number, since it is larger than the sum of its proper divisors (158641873).

661007675 is a wasteful number, since it uses less digits than its factorization.

661007675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26440317 (or 26440312 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 661007675 is about 25710.0695253825. The cubic root of 661007675 is about 871.1016453553.

The spelling of 661007675 in words is "six hundred sixty-one million, seven thousand, six hundred seventy-five".