66665052 has 24 divisors (see below), whose sum is σ = 172835600. Its totient is φ = 22221648.

The previous prime is 66665051. The next prime is 66665059. The reversal of 66665052 is 25056666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 66664998 and 66665016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66665051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308527 + ... + 308742.

Almost surely, 2^66665052 is an apocalyptic number.

It is an amenable number.

66665052 is an abundant number, since it is smaller than the sum of its proper divisors (106170548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66665052 is a wasteful number, since it uses less digits than its factorization.

66665052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617282 (or 617274 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 66665052 is about 8164.8669309426. The cubic root of 66665052 is about 405.4768594355.

The spelling of 66665052 in words is "sixty-six million, six hundred sixty-five thousand, fifty-two".