66896478 has 24 divisors (see below), whose sum is σ = 158119416. Its totient is φ = 20271600.

The previous prime is 66896471. The next prime is 66896483. The reversal of 66896478 is 87469866.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66896471) 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, 168733 + ... + 169128.

It is an arithmetic number, because the mean of its divisors is an integer number (6588309).

Almost surely, 2^66896478 is an apocalyptic number.

66896478 is an abundant number, since it is smaller than the sum of its proper divisors (91222938).

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

66896478 is a wasteful number, since it uses less digits than its factorization.

66896478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337880 (or 337877 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 66896478 is about 8179.0267147137. The cubic root of 66896478 is about 405.9455183431.

The spelling of 66896478 in words is "sixty-six million, eight hundred ninety-six thousand, four hundred seventy-eight".