6478370590066 has 4 divisors (see below), whose sum is σ = 9717555885102. Its totient is φ = 3239185295032.

The previous prime is 6478370590033. The next prime is 6478370590091. The reversal of 6478370590066 is 6600950738746.

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

It can be written as a sum of positive squares in only one way, i.e., 6355365370225 + 123005219841 = 2520985^2 + 350721^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6478370589986 and 6478370590013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1619592647515 + ... + 1619592647518.

Almost surely, 2^{6478370590066} is an apocalyptic number.

6478370590066 is a deficient number, since it is larger than the sum of its proper divisors (3239185295036).

6478370590066 is a wasteful number, since it uses less digits than its factorization.

6478370590066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239185295035.

The product of its (nonzero) digits is 45722880, while the sum is 61.

The spelling of 6478370590066 in words is "six trillion, four hundred seventy-eight billion, three hundred seventy million, five hundred ninety thousand, sixty-six".