1966894155 has 48 divisors (see below), whose sum is σ = 3602776320. Its totient is φ = 989907264.

The previous prime is 1966894147. The next prime is 1966894199. The reversal of 1966894155 is 5514986691.

It is not a de Polignac number, because 1966894155 - 2³ = 1966894147 is a prime.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 220492 + ... + 229238.

It is an arithmetic number, because the mean of its divisors is an integer number (75057840).

Almost surely, 2^1966894155 is an apocalyptic number.

1966894155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1966894155 is a deficient number, since it is larger than the sum of its proper divisors (1635882165).

1966894155 is a wasteful number, since it uses less digits than its factorization.

1966894155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9040 (or 9037 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 1966894155 is about 44349.6804385330. The cubic root of 1966894155 is about 1252.9305438942.

The spelling of 1966894155 in words is "one billion, nine hundred sixty-six million, eight hundred ninety-four thousand, one hundred fifty-five".