661676675 has 12 divisors (see below), whose sum is σ = 895068456. Its totient is φ = 481219200.

The previous prime is 661676651. The next prime is 661676683. The reversal of 661676675 is 576676166.

It is not a de Polignac number, because 661676675 - 2¹⁴ = 661660291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1202774 + ... + 1203323.

It is an arithmetic number, because the mean of its divisors is an integer number (74589038).

Almost surely, 2^661676675 is an apocalyptic number.

661676675 is a deficient number, since it is larger than the sum of its proper divisors (233391781).

661676675 is a wasteful number, since it uses less digits than its factorization.

661676675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406118 (or 2406113 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 50.

The square root of 661676675 is about 25723.0767016700. The cubic root of 661676675 is about 871.3954243480.

The spelling of 661676675 in words is "six hundred sixty-one million, six hundred seventy-six thousand, six hundred seventy-five".