766041661 has 8 divisors (see below), whose sum is σ = 955065024. Its totient is φ = 596915520.

The previous prime is 766041643. The next prime is 766041697. The reversal of 766041661 is 166140667.

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 766041661 - 2⁹ = 766041149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 766041661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766041161) 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, 4974220 + ... + 4974373.

It is an arithmetic number, because the mean of its divisors is an integer number (119383128).

Almost surely, 2^766041661 is an apocalyptic number.

It is an amenable number.

766041661 is a deficient number, since it is larger than the sum of its proper divisors (189023363).

766041661 is a wasteful number, since it uses less digits than its factorization.

766041661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9948611.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 766041661 is about 27677.4576325211. The cubic root of 766041661 is about 914.9923500610.

The spelling of 766041661 in words is "seven hundred sixty-six million, forty-one thousand, six hundred sixty-one".