66646460200426 has 8 divisors (see below), whose sum is σ = 99969791097924. Its totient is φ = 33323196501120.

The previous prime is 66646460200423. The next prime is 66646460200469. The reversal of 66646460200426 is 62400206464666.

It can be written as a sum of positive squares in 2 ways, for example, as 65208871190401 + 1437589010025 = 8075201^2 + 1198995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66646460200423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14242215 + ... + 18333946.

Almost surely, 2^{66646460200426} is an apocalyptic number.

66646460200426 is a deficient number, since it is larger than the sum of its proper divisors (33323330897498).

66646460200426 is a wasteful number, since it uses less digits than its factorization.

66646460200426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33599096.

The product of its (nonzero) digits is 11943936, while the sum is 52.

The spelling of 66646460200426 in words is "sixty-six trillion, six hundred forty-six billion, four hundred sixty million, two hundred thousand, four hundred twenty-six".