66153650 has 12 divisors (see below), whose sum is σ = 123045882. Its totient is φ = 26461440.

The previous prime is 66153631. The next prime is 66153667. The reversal of 66153650 is 5635166.

It can be written as a sum of positive squares in 3 ways, for example, as 50225569 + 15928081 = 7087^2 + 3991^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 661487 + ... + 661586.

Almost surely, 2^66153650 is an apocalyptic number.

66153650 is a deficient number, since it is larger than the sum of its proper divisors (56892232).

66153650 is a wasteful number, since it uses less digits than its factorization.

66153650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323085 (or 1323080 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 66153650 is about 8133.4894110707. The cubic root of 66153650 is about 404.4373633240.

The spelling of 66153650 in words is "sixty-six million, one hundred fifty-three thousand, six hundred fifty".