66973522 has 32 divisors (see below), whose sum is σ = 125668224. Its totient is φ = 26006400.

The previous prime is 66973507. The next prime is 66973573. The reversal of 66973522 is 22537966.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64318 + ... + 65350.

It is an arithmetic number, because the mean of its divisors is an integer number (3927132).

Almost surely, 2^66973522 is an apocalyptic number.

66973522 is a deficient number, since it is larger than the sum of its proper divisors (58694702).

66973522 is a wasteful number, since it uses less digits than its factorization.

66973522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474.

The product of its digits is 136080, while the sum is 40.

The square root of 66973522 is about 8183.7352107702. The cubic root of 66973522 is about 406.1012996762.

Subtracting from 66973522 its reverse (22537966), we obtain a square (44435556 = 6666²).

The spelling of 66973522 in words is "sixty-six million, nine hundred seventy-three thousand, five hundred twenty-two".