66053478 has 16 divisors (see below), whose sum is σ = 132793776. Its totient is φ = 21903360.

The previous prime is 66053453. The next prime is 66053479. The reversal of 66053478 is 87435066.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66053479) 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, 27363 + ... + 29678.

It is an arithmetic number, because the mean of its divisors is an integer number (8299611).

Almost surely, 2^66053478 is an apocalyptic number.

66053478 is an abundant number, since it is smaller than the sum of its proper divisors (66740298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66053478 is a wasteful number, since it uses less digits than its factorization.

66053478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57239.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 66053478 is about 8127.3290815618. The cubic root of 66053478 is about 404.2331228141.

The spelling of 66053478 in words is "sixty-six million, fifty-three thousand, four hundred seventy-eight".