66158547157 has 4 divisors (see below), whose sum is σ = 66167718880. Its totient is φ = 66149375436.

The previous prime is 66158547139. The next prime is 66158547163. The reversal of 66158547157 is 75174585166.

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 a de Polignac number, because none of the positive numbers 2^k-66158547157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66158547098 and 66158547107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66158547557) 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, 4575033 + ... + 4589470.

It is an arithmetic number, because the mean of its divisors is an integer number (16541929720).

Almost surely, 2^66158547157 is an apocalyptic number.

It is an amenable number.

66158547157 is a deficient number, since it is larger than the sum of its proper divisors (9171723).

66158547157 is an equidigital number, since it uses as much as digits as its factorization.

66158547157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9171722.

The product of its digits is 7056000, while the sum is 55.

The spelling of 66158547157 in words is "sixty-six billion, one hundred fifty-eight million, five hundred forty-seven thousand, one hundred fifty-seven".