196666687930 has 32 divisors (see below), whose sum is σ = 367167355920. Its totient is φ = 75782707200.

The previous prime is 196666687927. The next prime is 196666687939. The reversal of 196666687930 is 39786666691.

It can be written as a sum of positive squares in 8 ways, for example, as 173721406401 + 22945281529 = 416799^2 + 151477^2 .

It is a super-2 number, since 2×196666687930² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (196666687939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2593975 + ... + 2668714.

Almost surely, 2^196666687930 is an apocalyptic number.

196666687930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

196666687930 is a deficient number, since it is larger than the sum of its proper divisors (170500667990).

196666687930 is a wasteful number, since it uses less digits than its factorization.

196666687930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5262834.

The product of its (nonzero) digits is 105815808, while the sum is 67.

The spelling of 196666687930 in words is "one hundred ninety-six billion, six hundred sixty-six million, six hundred eighty-seven thousand, nine hundred thirty".