3661495787 has 4 divisors (see below), whose sum is σ = 3820691280. Its totient is φ = 3502300296.

The previous prime is 3661495769. The next prime is 3661495793. The reversal of 3661495787 is 7875941663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7875941663 = 11317 ⋅695939.

It is a cyclic number.

It is not a de Polignac number, because 3661495787 - 2¹⁴ = 3661479403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3661492787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79597712 + ... + 79597757.

It is an arithmetic number, because the mean of its divisors is an integer number (955172820).

Almost surely, 2^3661495787 is an apocalyptic number.

3661495787 is a deficient number, since it is larger than the sum of its proper divisors (159195493).

3661495787 is a wasteful number, since it uses less digits than its factorization.

3661495787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159195492.

The product of its digits is 7620480, while the sum is 56.

The square root of 3661495787 is about 60510.2948844244. The cubic root of 3661495787 is about 1541.2964552121.

The spelling of 3661495787 in words is "three billion, six hundred sixty-one million, four hundred ninety-five thousand, seven hundred eighty-seven".