974555661 has 8 divisors (see below), whose sum is σ = 1308013504. Its totient is φ = 645400800.

The previous prime is 974555611. The next prime is 974555663. The reversal of 974555661 is 166555479.

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

It is not a de Polignac number, because 974555661 - 2¹⁴ = 974539277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 974555661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (974555663) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1075216 + ... + 1076121.

It is an arithmetic number, because the mean of its divisors is an integer number (163501688).

Almost surely, 2^974555661 is an apocalyptic number.

It is an amenable number.

974555661 is a deficient number, since it is larger than the sum of its proper divisors (333457843).

974555661 is a wasteful number, since it uses less digits than its factorization.

974555661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151491.

The product of its digits is 1134000, while the sum is 48.

The square root of 974555661 is about 31217.8740627865. The cubic root of 974555661 is about 991.4455843039.

The spelling of 974555661 in words is "nine hundred seventy-four million, five hundred fifty-five thousand, six hundred sixty-one".