66372544 has 28 divisors (see below), whose sum is σ = 150524464. Its totient is φ = 28445184.

The previous prime is 66372517. The next prime is 66372547. The reversal of 66372544 is 44527366.

66372544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-3 number, since 3×66372544³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66372547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73629 + ... + 74524.

Almost surely, 2^66372544 is an apocalyptic number.

66372544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66372544 is an abundant number, since it is smaller than the sum of its proper divisors (84151920).

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

66372544 is a wasteful number, since it uses less digits than its factorization.

66372544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148172 (or 148162 counting only the distinct ones).

The product of its digits is 120960, while the sum is 37.

The square root of 66372544 is about 8146.9346382551. The cubic root of 66372544 is about 404.8829494591.

The spelling of 66372544 in words is "sixty-six million, three hundred seventy-two thousand, five hundred forty-four".