66287329040 has 40 divisors (see below), whose sum is σ = 156418321920. Its totient is φ = 26119184256.

The previous prime is 66287329039. The next prime is 66287329079. The reversal of 66287329040 is 4092378266.

66287329040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6178160 + ... + 6188879.

It is an arithmetic number, because the mean of its divisors is an integer number (3910458048).

Almost surely, 2^66287329040 is an apocalyptic number.

It is an amenable number.

66287329040 is an abundant number, since it is smaller than the sum of its proper divisors (90130992880).

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

66287329040 is a wasteful number, since it uses less digits than its factorization.

66287329040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12367119 (or 12367113 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 66287329040 in words is "sixty-six billion, two hundred eighty-seven million, three hundred twenty-nine thousand, forty".