766668733685 has 64 divisors (see below), whose sum is σ = 1000828846080. Its totient is φ = 561677276160.

The previous prime is 766668733681. The next prime is 766668733729. The reversal of 766668733685 is 586337866667.

It is not a de Polignac number, because 766668733685 - 2² = 766668733681 is a prime.

It is a super-2 number, since 2×766668733685² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766668733681) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 258049250 + ... + 258052220.

It is an arithmetic number, because the mean of its divisors is an integer number (15637950720).

Almost surely, 2^766668733685 is an apocalyptic number.

It is an amenable number.

766668733685 is a deficient number, since it is larger than the sum of its proper divisors (234160112395).

766668733685 is a wasteful number, since it uses less digits than its factorization.

766668733685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3618.

The product of its digits is 1097349120, while the sum is 71.

The spelling of 766668733685 in words is "seven hundred sixty-six billion, six hundred sixty-eight million, seven hundred thirty-three thousand, six hundred eighty-five".