395642066 has 4 divisors (see below), whose sum is σ = 593463102. Its totient is φ = 197821032.

The previous prime is 395642029. The next prime is 395642069. The reversal of 395642066 is 660246593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 660246593 = 359 ⋅1839127.

It can be written as a sum of positive squares in only one way, i.e., 273207841 + 122434225 = 16529^2 + 11065^2 .

It is not an unprimeable number, because it can be changed into a prime (395642069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98910515 + ... + 98910518.

Almost surely, 2^395642066 is an apocalyptic number.

395642066 is a deficient number, since it is larger than the sum of its proper divisors (197821036).

395642066 is a wasteful number, since it uses less digits than its factorization.

395642066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197821035.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 395642066 is about 19890.7532788479. The cubic root of 395642066 is about 734.1207286806.

The spelling of 395642066 in words is "three hundred ninety-five million, six hundred forty-two thousand, sixty-six".