66052819 has 4 divisors (see below), whose sum is σ = 75488944. Its totient is φ = 56616696.

The previous prime is 66052817. The next prime is 66052841. The reversal of 66052819 is 91825066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66052819 - 2¹ = 66052817 is a prime.

It is a super-2 number, since 2×66052819² = 8725949795693522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66052817) 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, 4718052 + ... + 4718065.

It is an arithmetic number, because the mean of its divisors is an integer number (18872236).

Almost surely, 2^66052819 is an apocalyptic number.

66052819 is a deficient number, since it is larger than the sum of its proper divisors (9436125).

66052819 is an equidigital number, since it uses as much as digits as its factorization.

66052819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9436124.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 66052819 is about 8127.2885392362. The cubic root of 66052819 is about 404.2317784967.

The spelling of 66052819 in words is "sixty-six million, fifty-two thousand, eight hundred nineteen".