66622550 has 36 divisors (see below), whose sum is σ = 130818636. Its totient is φ = 25239600.

The previous prime is 66622511. The next prime is 66622573. The reversal of 66622550 is 5522666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16205 + ... + 19895.

It is an arithmetic number, because the mean of its divisors is an integer number (3633851).

Almost surely, 2^66622550 is an apocalyptic number.

66622550 is a deficient number, since it is larger than the sum of its proper divisors (64196086).

66622550 is a wasteful number, since it uses less digits than its factorization.

66622550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741 (or 3717 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 66622550 is about 8162.2637791240. The cubic root of 66622550 is about 405.3906711422.

The spelling of 66622550 in words is "sixty-six million, six hundred twenty-two thousand, five hundred fifty".