7225507661 has 8 divisors (see below), whose sum is σ = 7642944960. Its totient is φ = 6816677472.

The previous prime is 7225507651. The next prime is 7225507669. The reversal of 7225507661 is 1667055227.

7225507661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 7225507661 - 2¹⁴ = 7225491277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7225507669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2150051 + ... + 2153408.

It is an arithmetic number, because the mean of its divisors is an integer number (955368120).

Almost surely, 2^7225507661 is an apocalyptic number.

It is an amenable number.

7225507661 is a deficient number, since it is larger than the sum of its proper divisors (417437299).

7225507661 is a wasteful number, since it uses less digits than its factorization.

7225507661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303555.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 7225507661 is about 85002.9861887216. The cubic root of 7225507661 is about 1933.2563942397.

The spelling of 7225507661 in words is "seven billion, two hundred twenty-five million, five hundred seven thousand, six hundred sixty-one".