66652544525666 has 64 divisors (see below), whose sum is σ = 110903457208320. Its totient is φ = 29788434624960.

The previous prime is 66652544525639. The next prime is 66652544525687.

It is a happy number.

66652544525666 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66652544525596 and 66652544525605.

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, 3532374080 + ... + 3532392948.

It is an arithmetic number, because the mean of its divisors is an integer number (1732866518880).

Almost surely, 2^{66652544525666} is an apocalyptic number.

66652544525666 is a deficient number, since it is larger than the sum of its proper divisors (44250912682654).

66652544525666 is a wasteful number, since it uses less digits than its factorization.

66652544525666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23319.

The product of its digits is 1866240000, while the sum is 68.

The spelling of 66652544525666 in words is "sixty-six trillion, six hundred fifty-two billion, five hundred forty-four million, five hundred twenty-five thousand, six hundred sixty-six".