66455352978 has 16 divisors (see below), whose sum is σ = 151897949760. Its totient is φ = 18987243696.

The previous prime is 66455352967. The next prime is 66455353009. The reversal of 66455352978 is 87925355466.

66455352978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 791135113 + ... + 791135196.

It is an arithmetic number, because the mean of its divisors is an integer number (9493621860).

Almost surely, 2^66455352978 is an apocalyptic number.

66455352978 is an abundant number, since it is smaller than the sum of its proper divisors (85442596782).

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

66455352978 is a wasteful number, since it uses less digits than its factorization.

66455352978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582270321.

The product of its digits is 54432000, while the sum is 60.

The spelling of 66455352978 in words is "sixty-six billion, four hundred fifty-five million, three hundred fifty-two thousand, nine hundred seventy-eight".