66868073400 has 48 divisors (see below), whose sum is σ = 207291029400. Its totient is φ = 17831486080.

The previous prime is 66868073359. The next prime is 66868073413. The reversal of 66868073400 is 437086866.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66868073400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55722795 + ... + 55723994.

Almost surely, 2^66868073400 is an apocalyptic number.

66868073400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66868073400 is an abundant number, since it is smaller than the sum of its proper divisors (140422956000).

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

66868073400 is a wasteful number, since it uses less digits than its factorization.

66868073400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111446808 (or 111446799 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The spelling of 66868073400 in words is "sixty-six billion, eight hundred sixty-eight million, seventy-three thousand, four hundred".