66012251401 has 8 divisors (see below), whose sum is σ = 69754279680. Its totient is φ = 62342884032.

The previous prime is 66012251359. The next prime is 66012251423. The reversal of 66012251401 is 10415221066.

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

It is a cyclic number.

It is not a de Polignac number, because 66012251401 - 2²⁵ = 65978696969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66012251401.

It is not an unprimeable number, because it can be changed into a prime (66012257401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18163360 + ... + 18166993.

It is an arithmetic number, because the mean of its divisors is an integer number (8719284960).

Almost surely, 2^66012251401 is an apocalyptic number.

It is an amenable number.

66012251401 is a deficient number, since it is larger than the sum of its proper divisors (3742028279).

66012251401 is a wasteful number, since it uses less digits than its factorization.

66012251401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36330455.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 66012251401 its reverse (10415221066), we get a palindrome (76427472467).

The spelling of 66012251401 in words is "sixty-six billion, twelve million, two hundred fifty-one thousand, four hundred one".