3660378745 has 4 divisors (see below), whose sum is σ = 4392454500. Its totient is φ = 2928302992.

The previous prime is 3660378731. The next prime is 3660378751. The reversal of 3660378745 is 5478730663.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1322849641 + 2337529104 = 36371^2 + 48348^2 .

It is a cyclic number.

It is not a de Polignac number, because 3660378745 - 2⁵ = 3660378713 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366037870 + ... + 366037879.

It is an arithmetic number, because the mean of its divisors is an integer number (1098113625).

Almost surely, 2^3660378745 is an apocalyptic number.

It is an amenable number.

3660378745 is a deficient number, since it is larger than the sum of its proper divisors (732075755).

3660378745 is an equidigital number, since it uses as much as digits as its factorization.

3660378745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732075754.

The product of its (nonzero) digits is 2540160, while the sum is 49.

The square root of 3660378745 is about 60501.0639989083. The cubic root of 3660378745 is about 1541.1397006971.

The spelling of 3660378745 in words is "three billion, six hundred sixty million, three hundred seventy-eight thousand, seven hundred forty-five".