7661206447 has 2 divisors, whose sum is σ = 7661206448. Its totient is φ = 7661206446.

The previous prime is 7661206439. The next prime is 7661206493. The reversal of 7661206447 is 7446021667.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7661206447 - 2³ = 7661206439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7661200447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3830603223 + 3830603224.

It is an arithmetic number, because the mean of its divisors is an integer number (3830603224).

Almost surely, 2^7661206447 is an apocalyptic number.

7661206447 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661206447 is an equidigital number, since it uses as much as digits as its factorization.

7661206447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 7661206447 is about 87528.3179719569. The cubic root of 7661206447 is about 1971.3590085878.

The spelling of 7661206447 in words is "seven billion, six hundred sixty-one million, two hundred six thousand, four hundred forty-seven".