66652605 has 32 divisors (see below), whose sum is σ = 120278400. Its totient is φ = 35012736.

The previous prime is 66652601. The next prime is 66652613. The reversal of 66652605 is 50625666.

It is not a de Polignac number, because 66652605 - 2² = 66652601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66652605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66652601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5361 + ... + 12729.

It is an arithmetic number, because the mean of its divisors is an integer number (3758700).

Almost surely, 2^66652605 is an apocalyptic number.

It is an amenable number.

66652605 is a deficient number, since it is larger than the sum of its proper divisors (53625795).

66652605 is a wasteful number, since it uses less digits than its factorization.

66652605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450 (or 7444 counting only the distinct ones).

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

The square root of 66652605 is about 8164.1046661591. The cubic root of 66652605 is about 405.4516224012.

The spelling of 66652605 in words is "sixty-six million, six hundred fifty-two thousand, six hundred five".