975000661 has 2 divisors, whose sum is σ = 975000662. Its totient is φ = 975000660.

The previous prime is 975000617. The next prime is 975000671. The reversal of 975000661 is 166000579.

975000661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 975000625 + 36 = 31225^2 + 6^2 .

It is an emirp because it is prime and its reverse (166000579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 975000661 - 2¹¹ = 974998613 is a prime.

It is equal to p_49640380 and since 975000661 and 49640380 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975000671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487500330 + 487500331.

It is an arithmetic number, because the mean of its divisors is an integer number (487500331).

Almost surely, 2^975000661 is an apocalyptic number.

It is an amenable number.

975000661 is a deficient number, since it is larger than the sum of its proper divisors (1).

975000661 is an equidigital number, since it uses as much as digits as its factorization.

975000661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 975000661 is about 31225.0005764612. Note that the first 3 decimals coincide. The cubic root of 975000661 is about 991.5964654241.

The spelling of 975000661 in words is "nine hundred seventy-five million, six hundred sixty-one", and thus it is an aban number.