66854544 has 20 divisors (see below), whose sum is σ = 172707696. Its totient is φ = 22284832.

The previous prime is 66854533. The next prime is 66854549. The reversal of 66854544 is 44545866.

It is a junction number, because it is equal to n+sod(n) for n = 66854496 and 66854505.

It is not an unprimeable number, because it can be changed into a prime (66854549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696354 + ... + 696449.

Almost surely, 2^66854544 is an apocalyptic number.

It is an amenable number.

66854544 is an abundant number, since it is smaller than the sum of its proper divisors (105853152).

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

66854544 is a wasteful number, since it uses less digits than its factorization.

66854544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392814 (or 1392808 counting only the distinct ones).

The product of its digits is 460800, while the sum is 42.

The square root of 66854544 is about 8176.4628049053. The cubic root of 66854544 is about 405.8606784131.

The spelling of 66854544 in words is "sixty-six million, eight hundred fifty-four thousand, five hundred forty-four".