66754044 has 72 divisors (see below), whose sum is σ = 200007808. Its totient is φ = 19070640.

The previous prime is 66754033. The next prime is 66754057. The reversal of 66754044 is 44045766.

It is a super-2 number, since 2×66754044² = 8912204780707872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1899 + ... + 11709.

Almost surely, 2^66754044 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 66754044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100003904).

66754044 is an abundant number, since it is smaller than the sum of its proper divisors (133253764).

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

66754044 is a wasteful number, since it uses less digits than its factorization.

66754044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9837 (or 9823 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 66754044 is about 8170.3148042165. The cubic root of 66754044 is about 405.6572045643.

The spelling of 66754044 in words is "sixty-six million, seven hundred fifty-four thousand, forty-four".