66418748 has 12 divisors (see below), whose sum is σ = 126799512. Its totient is φ = 30190320.

The previous prime is 66418741. The next prime is 66418753. The reversal of 66418748 is 84781466.

It is a super-2 number, since 2×66418748² = 8822900171775008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 1509517 = 66418748 / (6 + 6 + 4 + 1 + 8 + 7 + 4 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 66418699 and 66418708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66418741) 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, 754715 + ... + 754802.

It is an arithmetic number, because the mean of its divisors is an integer number (10566626).

Almost surely, 2^66418748 is an apocalyptic number.

It is an amenable number.

66418748 is a deficient number, since it is larger than the sum of its proper divisors (60380764).

66418748 is a wasteful number, since it uses less digits than its factorization.

66418748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509532 (or 1509530 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 66418748 is about 8149.7698127002. The cubic root of 66418748 is about 404.9768782207.

It can be divided in two parts, 66 and 418748, that added together give a palindrome (418814).

The spelling of 66418748 in words is "sixty-six million, four hundred eighteen thousand, seven hundred forty-eight".