66229478 has 24 divisors (see below), whose sum is σ = 121649400. Its totient is φ = 26889408.

The previous prime is 66229477. The next prime is 66229487. The reversal of 66229478 is 87492266.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66229477) 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, 15923 + ... + 19646.

It is an arithmetic number, because the mean of its divisors is an integer number (5068725).

Almost surely, 2^66229478 is an apocalyptic number.

66229478 is a deficient number, since it is larger than the sum of its proper divisors (55419922).

66229478 is a wasteful number, since it uses less digits than its factorization.

66229478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35604 (or 35597 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 66229478 is about 8138.1495439688. The cubic root of 66229478 is about 404.5918318294.

The spelling of 66229478 in words is "sixty-six million, two hundred twenty-nine thousand, four hundred seventy-eight".