66431355101 has 8 divisors (see below), whose sum is σ = 69322267584. Its totient is φ = 63540658720.

The previous prime is 66431355043. The next prime is 66431355103. The reversal of 66431355101 is 10155313466.

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 66431355101 - 2¹⁴ = 66431338717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66431355103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088345 + ... + 1147761.

It is an arithmetic number, because the mean of its divisors is an integer number (8665283448).

Almost surely, 2^66431355101 is an apocalyptic number.

It is an amenable number.

66431355101 is a deficient number, since it is larger than the sum of its proper divisors (2890912483).

66431355101 is a wasteful number, since it uses less digits than its factorization.

66431355101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108051.

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 66431355101 its reverse (10155313466), we get a palindrome (76586668567).

The spelling of 66431355101 in words is "sixty-six billion, four hundred thirty-one million, three hundred fifty-five thousand, one hundred one".