66877428 has 48 divisors (see below), whose sum is σ = 160312320. Its totient is φ = 21689184.

The previous prime is 66877409. The next prime is 66877471. The reversal of 66877428 is 82477866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159403 + ... + 159821.

It is an arithmetic number, because the mean of its divisors is an integer number (3339840).

Almost surely, 2^66877428 is an apocalyptic number.

It is an amenable number.

66877428 is an abundant number, since it is smaller than the sum of its proper divisors (93434892).

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

66877428 is a wasteful number, since it uses less digits than its factorization.

66877428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 754 counting only the distinct ones).

The product of its digits is 903168, while the sum is 48.

The square root of 66877428 is about 8177.8620678023. The cubic root of 66877428 is about 405.9069812057.

The spelling of 66877428 in words is "sixty-six million, eight hundred seventy-seven thousand, four hundred twenty-eight".