66546744 has 64 divisors (see below), whose sum is σ = 183738240. Its totient is φ = 19916160.

The previous prime is 66546737. The next prime is 66546763. The reversal of 66546744 is 44764566.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66546696 and 66546705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20394 + ... + 23430.

It is an arithmetic number, because the mean of its divisors is an integer number (2870910).

Almost surely, 2^66546744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66546744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91869120).

66546744 is an abundant number, since it is smaller than the sum of its proper divisors (117191496).

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

66546744 is a wasteful number, since it uses less digits than its factorization.

66546744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140 (or 3136 counting only the distinct ones).

The product of its digits is 483840, while the sum is 42.

The square root of 66546744 is about 8157.6187702049. The cubic root of 66546744 is about 405.2368558134.

The spelling of 66546744 in words is "sixty-six million, five hundred forty-six thousand, seven hundred forty-four".