66400442451362 has 4 divisors (see below), whose sum is σ = 99600663677046. Its totient is φ = 33200221225680.

The previous prime is 66400442451359. The next prime is 66400442451373. The reversal of 66400442451362 is 26315424400466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56462886044041 + 9937556407321 = 7514179^2 + 3152389^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16600110612839 + ... + 16600110612842.

Almost surely, 2^{66400442451362} is an apocalyptic number.

66400442451362 is a deficient number, since it is larger than the sum of its proper divisors (33200221225684).

66400442451362 is a wasteful number, since it uses less digits than its factorization.

66400442451362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33200221225683.

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 66400442451362 in words is "sixty-six trillion, four hundred billion, four hundred forty-two million, four hundred fifty-one thousand, three hundred sixty-two".