66852497801 has 4 divisors (see below), whose sum is σ = 66868347600. Its totient is φ = 66836648004.

The previous prime is 66852497783. The next prime is 66852497809. The reversal of 66852497801 is 10879425866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10879425866 = 2 ⋅5439712933.

It is a cyclic number.

It is not a de Polignac number, because 66852497801 - 2¹⁸ = 66852235657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66852497809) 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, 7918571 + ... + 7927008.

It is an arithmetic number, because the mean of its divisors is an integer number (16717086900).

Almost surely, 2^66852497801 is an apocalyptic number.

It is an amenable number.

66852497801 is a deficient number, since it is larger than the sum of its proper divisors (15849799).

66852497801 is a wasteful number, since it uses less digits than its factorization.

66852497801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15849798.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 66852497801 in words is "sixty-six billion, eight hundred fifty-two million, four hundred ninety-seven thousand, eight hundred one".