3666756678 has 64 divisors (see below), whose sum is σ = 8008906752. Its totient is φ = 1112440320.

The previous prime is 3666756677. The next prime is 3666756701. The reversal of 3666756678 is 8766576663.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666756671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2010475 + ... + 2012297.

It is an arithmetic number, because the mean of its divisors is an integer number (125139168).

Almost surely, 2^3666756678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3666756678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4004453376).

3666756678 is an abundant number, since it is smaller than the sum of its proper divisors (4342150074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3666756678 is a wasteful number, since it uses less digits than its factorization.

3666756678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189.

The product of its digits is 45722880, while the sum is 60.

The square root of 3666756678 is about 60553.7503215119. The cubic root of 3666756678 is about 1542.0342877540.

The spelling of 3666756678 in words is "three billion, six hundred sixty-six million, seven hundred fifty-six thousand, six hundred seventy-eight".