3666736641 has 16 divisors (see below), whose sum is σ = 5271819840. Its totient is φ = 2259348480.

The previous prime is 3666736639. The next prime is 3666736643. The reversal of 3666736641 is 1466376663.

3666736641 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3666736639) and next prime (3666736643).

It is not a de Polignac number, because 3666736641 - 2¹ = 3666736639 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3666736643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 782160 + ... + 786833.

It is an arithmetic number, because the mean of its divisors is an integer number (329488740).

Almost surely, 2^3666736641 is an apocalyptic number.

It is an amenable number.

3666736641 is a deficient number, since it is larger than the sum of its proper divisors (1605083199).

3666736641 is a wasteful number, since it uses less digits than its factorization.

3666736641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569056.

The product of its digits is 1959552, while the sum is 48.

The square root of 3666736641 is about 60553.5848732344. The cubic root of 3666736641 is about 1542.0314789323.

The spelling of 3666736641 in words is "three billion, six hundred sixty-six million, seven hundred thirty-six thousand, six hundred forty-one".