66210922 has 4 divisors (see below), whose sum is σ = 99316386. Its totient is φ = 33105460.

The previous prime is 66210917. The next prime is 66210931. The reversal of 66210922 is 22901266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 51854401 + 14356521 = 7201^2 + 3789^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16552729 + ... + 16552732.

Almost surely, 2^66210922 is an apocalyptic number.

66210922 is a deficient number, since it is larger than the sum of its proper divisors (33105464).

66210922 is a wasteful number, since it uses less digits than its factorization.

66210922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33105463.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 66210922 is about 8137.0094014939. The cubic root of 66210922 is about 404.5540424768.

The spelling of 66210922 in words is "sixty-six million, two hundred ten thousand, nine hundred twenty-two".