66582058978 has 16 divisors (see below), whose sum is σ = 102553244640. Its totient is φ = 32401520800.

The previous prime is 66582058973. The next prime is 66582058999. The reversal of 66582058978 is 87985028566.

66582058978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66582058973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 934588 + ... + 1003303.

It is an arithmetic number, because the mean of its divisors is an integer number (6409577790).

Almost surely, 2^66582058978 is an apocalyptic number.

66582058978 is a deficient number, since it is larger than the sum of its proper divisors (35971185662).

66582058978 is a wasteful number, since it uses less digits than its factorization.

66582058978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938353.

The product of its (nonzero) digits is 58060800, while the sum is 64.

The spelling of 66582058978 in words is "sixty-six billion, five hundred eighty-two million, fifty-eight thousand, nine hundred seventy-eight".