66959469 has 12 divisors (see below), whose sum is σ = 98045116. Its totient is φ = 44027712.

The previous prime is 66959467. The next prime is 66959479. The reversal of 66959469 is 96495966.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42575625 + 24383844 = 6525^2 + 4938^2 .

It is not a de Polignac number, because 66959469 - 2¹ = 66959467 is a prime.

It is a super-2 number, since 2×66959469² = 8967140977523922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66959467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50302 + ... + 51615.

Almost surely, 2^66959469 is an apocalyptic number.

It is an amenable number.

66959469 is a deficient number, since it is larger than the sum of its proper divisors (31085647).

66959469 is a wasteful number, since it uses less digits than its factorization.

66959469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101996 (or 101993 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 66959469 is about 8182.8765724530. The cubic root of 66959469 is about 406.0728937202.

The spelling of 66959469 in words is "sixty-six million, nine hundred fifty-nine thousand, four hundred sixty-nine".