66147154757 has 4 divisors (see below), whose sum is σ = 67078804896. Its totient is φ = 65215504620.

The previous prime is 66147154753. The next prime is 66147154769. The reversal of 66147154757 is 75745174166.

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 66147154757 - 2² = 66147154753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66147154699 and 66147154708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66147154753) 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, 465824963 + ... + 465825104.

It is an arithmetic number, because the mean of its divisors is an integer number (16769701224).

Almost surely, 2^66147154757 is an apocalyptic number.

It is an amenable number.

66147154757 is a deficient number, since it is larger than the sum of its proper divisors (931650139).

66147154757 is an equidigital number, since it uses as much as digits as its factorization.

66147154757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931650138.

The product of its digits is 4939200, while the sum is 53.

The spelling of 66147154757 in words is "sixty-six billion, one hundred forty-seven million, one hundred fifty-four thousand, seven hundred fifty-seven".