1966859652 has 12 divisors (see below), whose sum is σ = 4589339216. Its totient is φ = 655619880.

The previous prime is 1966859647. The next prime is 1966859669. The reversal of 1966859652 is 2569586691.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1966859652² = 7737073781331122208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1966859592 and 1966859601.

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 3 ways as a sum of consecutive naturals, for example, 81952474 + ... + 81952497.

Almost surely, 2^1966859652 is an apocalyptic number.

1966859652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1966859652 is an abundant number, since it is smaller than the sum of its proper divisors (2622479564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1966859652 is a wasteful number, since it uses less digits than its factorization.

1966859652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163904978 (or 163904976 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 57.

The square root of 1966859652 is about 44349.2914486804. The cubic root of 1966859652 is about 1252.9232176035.

The spelling of 1966859652 in words is "one billion, nine hundred sixty-six million, eight hundred fifty-nine thousand, six hundred fifty-two".