66854392701 has 4 divisors (see below), whose sum is σ = 89139190272. Its totient is φ = 44569595132.

The previous prime is 66854392697. The next prime is 66854392733. The reversal of 66854392701 is 10729345866.

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.

It is a cyclic number.

It is not a de Polignac number, because 66854392701 - 2² = 66854392697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66854392301) 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, 11142398781 + ... + 11142398786.

It is an arithmetic number, because the mean of its divisors is an integer number (22284797568).

It is a 1-persistent number, because it is pandigital, but 2⋅66854392701 = 133708785402 is not.

Almost surely, 2^66854392701 is an apocalyptic number.

It is an amenable number.

66854392701 is a deficient number, since it is larger than the sum of its proper divisors (22284797571).

66854392701 is a wasteful number, since it uses less digits than its factorization.

66854392701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22284797570.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 66854392701 in words is "sixty-six billion, eight hundred fifty-four million, three hundred ninety-two thousand, seven hundred one".