66666667340 has 96 divisors (see below), whose sum is σ = 176964837504. Its totient is φ = 20528640000.

The previous prime is 66666667337. The next prime is 66666667369. The reversal of 66666667340 is 4376666666.

It is a happy number.

66666667340 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 31 ways as a sum of consecutive naturals, for example, 427661 + ... + 562340.

It is an arithmetic number, because the mean of its divisors is an integer number (1843383724).

Almost surely, 2^66666667340 is an apocalyptic number.

It is an amenable number.

66666667340 is an abundant number, since it is smaller than the sum of its proper divisors (110298170164).

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

66666667340 is a wasteful number, since it uses less digits than its factorization.

66666667340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990067 (or 990065 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 56.

The spelling of 66666667340 in words is "sixty-six billion, six hundred sixty-six million, six hundred sixty-seven thousand, three hundred forty".