7661381633 has 8 divisors (see below), whose sum is σ = 7909779456. Its totient is φ = 7413062400.

The previous prime is 7661381597. The next prime is 7661381659. The reversal of 7661381633 is 3361831667.

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 7661381633 - 2⁶ = 7661381569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7661381933) 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, 228368 + ... + 259758.

It is an arithmetic number, because the mean of its divisors is an integer number (988722432).

Almost surely, 2^7661381633 is an apocalyptic number.

It is an amenable number.

7661381633 is a deficient number, since it is larger than the sum of its proper divisors (248397823).

7661381633 is a wasteful number, since it uses less digits than its factorization.

7661381633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39295.

The product of its digits is 326592, while the sum is 44.

The square root of 7661381633 is about 87529.3187052201. The cubic root of 7661381633 is about 1971.3740345879.

The spelling of 7661381633 in words is "seven billion, six hundred sixty-one million, three hundred eighty-one thousand, six hundred thirty-three".