66894803701 has 32 divisors (see below), whose sum is σ = 80211772800. Its totient is φ = 55261239040.

The previous prime is 66894803699. The next prime is 66894803713. The reversal of 66894803701 is 10730849866.

It is a happy number.

It is not a de Polignac number, because 66894803701 - 2¹ = 66894803699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66894803741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1545906 + ... + 1588588.

It is an arithmetic number, because the mean of its divisors is an integer number (2506617900).

Almost surely, 2^66894803701 is an apocalyptic number.

It is an amenable number.

66894803701 is a deficient number, since it is larger than the sum of its proper divisors (13316969099).

66894803701 is a wasteful number, since it uses less digits than its factorization.

66894803701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42774 (or 42740 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 66894803701 in words is "sixty-six billion, eight hundred ninety-four million, eight hundred three thousand, seven hundred one".