66652775 has 24 divisors (see below), whose sum is σ = 95232000. Its totient is φ = 45329760.

The previous prime is 66652771. The next prime is 66652777. The reversal of 66652775 is 57725666.

It is not a de Polignac number, because 66652775 - 2² = 66652771 is a prime.

It is a super-3 number, since 3×66652775³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66652771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20726 + ... + 23724.

It is an arithmetic number, because the mean of its divisors is an integer number (3968000).

Almost surely, 2^66652775 is an apocalyptic number.

66652775 is a deficient number, since it is larger than the sum of its proper divisors (28579225).

66652775 is a wasteful number, since it uses less digits than its factorization.

66652775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3138 counting only the distinct ones).

The product of its digits is 529200, while the sum is 44.

The square root of 66652775 is about 8164.1150775819. The cubic root of 66652775 is about 405.4519671075.

The spelling of 66652775 in words is "sixty-six million, six hundred fifty-two thousand, seven hundred seventy-five".