66744408 has 16 divisors (see below), whose sum is σ = 166861080. Its totient is φ = 22248128.

The previous prime is 66744407. The next prime is 66744427. The reversal of 66744408 is 80444766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66744407) 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, 1390485 + ... + 1390532.

Almost surely, 2^66744408 is an apocalyptic number.

It is an amenable number.

66744408 is an abundant number, since it is smaller than the sum of its proper divisors (100116672).

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

66744408 is a wasteful number, since it uses less digits than its factorization.

66744408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781026 (or 2781022 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 66744408 is about 8169.7250871740. The cubic root of 66744408 is about 405.6376846436.

The spelling of 66744408 in words is "sixty-six million, seven hundred forty-four thousand, four hundred eight".