66551314380 has 24 divisors (see below), whose sum is σ = 186343680432. Its totient is φ = 17747017152.

The previous prime is 66551314373. The next prime is 66551314387. The reversal of 66551314380 is 8341315566.

It is an interprime number because it is at equal distance from previous prime (66551314373) and next prime (66551314387).

It is not an unprimeable number, because it can be changed into a prime (66551314387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554594227 + ... + 554594346.

It is an arithmetic number, because the mean of its divisors is an integer number (7764320018).

Almost surely, 2^66551314380 is an apocalyptic number.

66551314380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66551314380 is an abundant number, since it is smaller than the sum of its proper divisors (119792366052).

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

66551314380 is a wasteful number, since it uses less digits than its factorization.

66551314380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109188585 (or 1109188583 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 66551314380 in words is "sixty-six billion, five hundred fifty-one million, three hundred fourteen thousand, three hundred eighty".