66553370 has 32 divisors (see below), whose sum is σ = 130797072. Its totient is φ = 24233472.

The previous prime is 66553369. The next prime is 66553381. The reversal of 66553370 is 7335566.

It can be written as a sum of positive squares in 8 ways, for example, as 30349081 + 36204289 = 5509^2 + 6017^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66553370.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5984 + ... + 12996.

Almost surely, 2^66553370 is an apocalyptic number.

66553370 is a deficient number, since it is larger than the sum of its proper divisors (64243702).

66553370 is a wasteful number, since it uses less digits than its factorization.

66553370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7106.

The product of its (nonzero) digits is 56700, while the sum is 35.

The square root of 66553370 is about 8158.0248835119. The cubic root of 66553370 is about 405.2503050579.

The spelling of 66553370 in words is "sixty-six million, five hundred fifty-three thousand, three hundred seventy".