186668686840 has 32 divisors (see below), whose sum is σ = 423857808000. Its totient is φ = 73982450304.

The previous prime is 186668686837. The next prime is 186668686843. The reversal of 186668686840 is 48686866681.

It is an interprime number because it is at equal distance from previous prime (186668686837) and next prime (186668686843).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186668686843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21402600 + ... + 21411319.

It is an arithmetic number, because the mean of its divisors is an integer number (13245556500).

Almost surely, 2^186668686840 is an apocalyptic number.

186668686840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

186668686840 is an abundant number, since it is smaller than the sum of its proper divisors (237189121160).

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

186668686840 is a wasteful number, since it uses less digits than its factorization.

186668686840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42814039 (or 42814035 counting only the distinct ones).

The product of its (nonzero) digits is 127401984, while the sum is 67.

The spelling of 186668686840 in words is "one hundred eighty-six billion, six hundred sixty-eight million, six hundred eighty-six thousand, eight hundred forty".