66552370 has 8 divisors (see below), whose sum is σ = 119794284. Its totient is φ = 26620944.

The previous prime is 66552337. The next prime is 66552371. The reversal of 66552370 is 7325566.

It can be written as a sum of positive squares in 2 ways, for example, as 66438801 + 113569 = 8151^2 + 337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66552371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3327609 + ... + 3327628.

Almost surely, 2^66552370 is an apocalyptic number.

66552370 is a deficient number, since it is larger than the sum of its proper divisors (53241914).

66552370 is a wasteful number, since it uses less digits than its factorization.

66552370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6655244.

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 66552370 is about 8157.9635939369. The cubic root of 66552370 is about 405.2482753469.

It can be divided in two parts, 6655 and 2370, that added together give a square (9025 = 95²).

The spelling of 66552370 in words is "sixty-six million, five hundred fifty-two thousand, three hundred seventy".