395552661 has 16 divisors (see below), whose sum is σ = 603961344. Its totient is φ = 225574704.

The previous prime is 395552639. The next prime is 395552671. The reversal of 395552661 is 166255593.

It is not a de Polignac number, because 395552661 - 2⁵ = 395552629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395552671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8161 + ... + 29286.

It is an arithmetic number, because the mean of its divisors is an integer number (37747584).

Almost surely, 2^395552661 is an apocalyptic number.

It is an amenable number.

395552661 is a deficient number, since it is larger than the sum of its proper divisors (208408683).

395552661 is a wasteful number, since it uses less digits than its factorization.

395552661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37960.

The product of its digits is 243000, while the sum is 42.

The square root of 395552661 is about 19888.5057508099. The cubic root of 395552661 is about 734.0654270045.

It can be divided in two parts, 3955 and 52661, that added together give a triangular number (56616 = T₃₃₆).

The spelling of 395552661 in words is "three hundred ninety-five million, five hundred fifty-two thousand, six hundred sixty-one".