7656061621 has 8 divisors (see below), whose sum is σ = 8245687520. Its totient is φ = 7066535472.

The previous prime is 7656061619. The next prime is 7656061669. The reversal of 7656061621 is 1261606567.

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 7656061621 - 2¹ = 7656061619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7656061601) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 234526 + ... + 265168.

It is an arithmetic number, because the mean of its divisors is an integer number (1030710940).

Almost surely, 2^7656061621 is an apocalyptic number.

It is an amenable number.

7656061621 is a deficient number, since it is larger than the sum of its proper divisors (589625899).

7656061621 is a wasteful number, since it uses less digits than its factorization.

7656061621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49875.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 7656061621 is about 87498.9235419499. The cubic root of 7656061621 is about 1970.9176259619.

The spelling of 7656061621 in words is "seven billion, six hundred fifty-six million, sixty-one thousand, six hundred twenty-one".