66745476 has 72 divisors (see below), whose sum is σ = 194061504. Its totient is φ = 18947520.

The previous prime is 66745457. The next prime is 66745477. The reversal of 66745476 is 67454766.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66745477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42831 + ... + 44361.

Almost surely, 2^66745476 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 66745476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97030752).

66745476 is an abundant number, since it is smaller than the sum of its proper divisors (127316028).

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

66745476 is a wasteful number, since it uses less digits than its factorization.

66745476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721 (or 1716 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 66745476 is about 8169.7904501890. The cubic root of 66745476 is about 405.6398482143.

The spelling of 66745476 in words is "sixty-six million, seven hundred forty-five thousand, four hundred seventy-six".