66120562 has 4 divisors (see below), whose sum is σ = 99180846. Its totient is φ = 33060280.

The previous prime is 66120557. The next prime is 66120563. The reversal of 66120562 is 26502166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26502166 = 2 ⋅13251083.

It can be written as a sum of positive squares in only one way, i.e., 49547521 + 16573041 = 7039^2 + 4071^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66120562.

It is not an unprimeable number, because it can be changed into a prime (66120563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16530139 + ... + 16530142.

Almost surely, 2^66120562 is an apocalyptic number.

66120562 is a deficient number, since it is larger than the sum of its proper divisors (33060284).

66120562 is a wasteful number, since it uses less digits than its factorization.

66120562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33060283.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66120562 is about 8131.4550973365. The cubic root of 66120562 is about 404.3699230785.

The spelling of 66120562 in words is "sixty-six million, one hundred twenty thousand, five hundred sixty-two".