53666666722 has 4 divisors (see below), whose sum is σ = 80500000086. Its totient is φ = 26833333360.

The previous prime is 53666666663. The next prime is 53666666741. The reversal of 53666666722 is 22766666635.

53666666722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22766666635 = 5 ⋅4553333327.

It can be written as a sum of positive squares in only one way, i.e., 52175239561 + 1491427161 = 228419^2 + 38619^2 .

It is a super-2 number, since 2×53666666722² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13416666679 + ... + 13416666682.

Almost surely, 2^53666666722 is an apocalyptic number.

53666666722 is a deficient number, since it is larger than the sum of its proper divisors (26833333364).

53666666722 is a wasteful number, since it uses less digits than its factorization.

53666666722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26833333363.

The product of its digits is 19595520, while the sum is 55.

The spelling of 53666666722 in words is "fifty-three billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred twenty-two".