3666172655 has 16 divisors (see below), whose sum is σ = 4662300384. Its totient is φ = 2757980160.

The previous prime is 3666172649. The next prime is 3666172667. The reversal of 3666172655 is 5562716663.

It is not a de Polignac number, because 3666172655 - 2¹⁸ = 3665910511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81119 + ... + 117951.

It is an arithmetic number, because the mean of its divisors is an integer number (291393774).

Almost surely, 2^3666172655 is an apocalyptic number.

3666172655 is a deficient number, since it is larger than the sum of its proper divisors (996127729).

3666172655 is a wasteful number, since it uses less digits than its factorization.

3666172655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38026.

The product of its digits is 1360800, while the sum is 47.

The square root of 3666172655 is about 60548.9277774594. The cubic root of 3666172655 is about 1541.9524141904.

The spelling of 3666172655 in words is "three billion, six hundred sixty-six million, one hundred seventy-two thousand, six hundred fifty-five".