66952459 has 4 divisors (see below), whose sum is σ = 76517104. Its totient is φ = 57387816.

The previous prime is 66952453. The next prime is 66952463. The reversal of 66952459 is 95425966.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95425966 = 2 ⋅47712983.

It is a cyclic number.

It is not a de Polignac number, because 66952459 - 2⁷ = 66952331 is a prime.

It is a super-2 number, since 2×66952459² = 8965263532293362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66952453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4782312 + ... + 4782325.

It is an arithmetic number, because the mean of its divisors is an integer number (19129276).

Almost surely, 2^66952459 is an apocalyptic number.

66952459 is a deficient number, since it is larger than the sum of its proper divisors (9564645).

66952459 is an equidigital number, since it uses as much as digits as its factorization.

66952459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9564644.

The product of its digits is 583200, while the sum is 46.

The square root of 66952459 is about 8182.4482277617. The cubic root of 66952459 is about 406.0587226086.

The spelling of 66952459 in words is "sixty-six million, nine hundred fifty-two thousand, four hundred fifty-nine".