7662751661 has 16 divisors (see below), whose sum is σ = 8271014400.
Its totient is φ = 7075697328.
The previous prime is 7662751651. The next prime is 7662751697. The reversal of 7662751661 is 1661572667.
It is a cyclic number.
It is not a de Polignac number, because 7662751661 - 214 = 7662735277 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 (7662751631) 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 in 15 ways as a sum of consecutive naturals, for example, 388250 + ... + 407508.
It is an arithmetic number, because the mean of its divisors is an integer number (516938400).
Almost surely, 27662751661 is an apocalyptic number.
It is an amenable number.
7662751661 is a deficient number, since it is larger than the sum of its proper divisors (608262739).
7662751661 is a wasteful number, since it uses less digits than its factorization.
7662751661 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 19808.
The product of its digits is 635040, while the sum is 47.
The square root of 7662751661 is about 87537.1444645072.
The cubic root of 7662751661 is about 1971.4915363120.
The spelling of 7662751661 in words is "seven billion, six hundred sixty-two million, seven hundred fifty-one thousand, six hundred sixty-one".