66495744 has 324 divisors, whose sum is σ = 242336640. Its totient is φ = 17418240.

The previous prime is 66495743. The next prime is 66495757. The reversal of 66495744 is 44759466.

It is a super-2 number, since 2×66495744² = 8843367940227072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66495744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66495743) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2145009 + ... + 2145039.

Almost surely, 2^66495744 is an apocalyptic number.

66495744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66495744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121168320).

66495744 is an abundant number, since it is smaller than the sum of its proper divisors (175840896).

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

66495744 is a wasteful number, since it uses less digits than its factorization.

66495744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 62 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 66495744 is about 8154.4922588718. The cubic root of 66495744 is about 405.1333077395.

The spelling of 66495744 in words is "sixty-six million, four hundred ninety-five thousand, seven hundred forty-four".