66426929 has 8 divisors (see below), whose sum is σ = 68168520. Its totient is φ = 64691200.

The previous prime is 66426923. The next prime is 66426931. The reversal of 66426929 is 92962466.

It can be written as a sum of positive squares in 4 ways, for example, as 9394225 + 57032704 = 3065^2 + 7552^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66426929 - 2⁸ = 66426673 is a prime.

It is a super-3 number, since 3×66426929³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66426929.

It is not an unprimeable number, because it can be changed into a prime (66426923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30137 + ... + 32265.

It is an arithmetic number, because the mean of its divisors is an integer number (8521065).

Almost surely, 2^66426929 is an apocalyptic number.

It is an amenable number.

66426929 is a deficient number, since it is larger than the sum of its proper divisors (1741591).

66426929 is a wasteful number, since it uses less digits than its factorization.

66426929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931.

The product of its digits is 279936, while the sum is 44.

The square root of 66426929 is about 8150.2717132621. The cubic root of 66426929 is about 404.9935049510.

The spelling of 66426929 in words is "sixty-six million, four hundred twenty-six thousand, nine hundred twenty-nine".