66622562 has 4 divisors (see below), whose sum is σ = 99933846. Its totient is φ = 33311280.

The previous prime is 66622511. The next prime is 66622573. The reversal of 66622562 is 26522666.

66622562 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: 26522666 = 2 ⋅13261333.

It can be written as a sum of positive squares in only one way, i.e., 61952641 + 4669921 = 7871^2 + 2161^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16655639 + ... + 16655642.

Almost surely, 2^66622562 is an apocalyptic number.

66622562 is a deficient number, since it is larger than the sum of its proper divisors (33311284).

66622562 is a wasteful number, since it uses less digits than its factorization.

66622562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33311283.

The product of its digits is 51840, while the sum is 35.

The square root of 66622562 is about 8162.2645142142. The cubic root of 66622562 is about 405.3906954817.

The spelling of 66622562 in words is "sixty-six million, six hundred twenty-two thousand, five hundred sixty-two".