66446425355 has 4 divisors (see below), whose sum is σ = 79735710432. Its totient is φ = 53157140280.

The previous prime is 66446425337. The next prime is 66446425373. The reversal of 66446425355 is 55352464466.

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

It is an interprime number because it is at equal distance from previous prime (66446425337) and next prime (66446425373).

It is not a de Polignac number, because 66446425355 - 2⁶ = 66446425291 is a prime.

It is a super-3 number, since 3×66446425355³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6644642531 + ... + 6644642540.

It is an arithmetic number, because the mean of its divisors is an integer number (19933927608).

Almost surely, 2^66446425355 is an apocalyptic number.

66446425355 is a deficient number, since it is larger than the sum of its proper divisors (13289285077).

66446425355 is a wasteful number, since it uses less digits than its factorization.

66446425355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13289285076.

The product of its digits is 10368000, while the sum is 50.

The spelling of 66446425355 in words is "sixty-six billion, four hundred forty-six million, four hundred twenty-five thousand, three hundred fifty-five".