66446462420 has 48 divisors (see below), whose sum is σ = 150754601088. Its totient is φ = 24455160960.

The previous prime is 66446462371. The next prime is 66446462431. The reversal of 66446462420 is 2426464466.

66446462420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330014 + ... + 491733.

It is an arithmetic number, because the mean of its divisors is an integer number (3140720856).

Almost surely, 2^66446462420 is an apocalyptic number.

It is an amenable number.

66446462420 is an abundant number, since it is smaller than the sum of its proper divisors (84308138668).

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

66446462420 is a wasteful number, since it uses less digits than its factorization.

66446462420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822080 (or 822078 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 66446462420 in words is "sixty-six billion, four hundred forty-six million, four hundred sixty-two thousand, four hundred twenty".