66445477763 has 8 divisors (see below), whose sum is σ = 76898926080. Its totient is φ = 56232338760.

The previous prime is 66445477757. The next prime is 66445477793. The reversal of 66445477763 is 36777454466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66445477763 - 2²⁰ = 66444429187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66445477793) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60076733 + ... + 60077838.

It is an arithmetic number, because the mean of its divisors is an integer number (9612365760).

Almost surely, 2^66445477763 is an apocalyptic number.

66445477763 is a deficient number, since it is larger than the sum of its proper divisors (10453448317).

66445477763 is a wasteful number, since it uses less digits than its factorization.

66445477763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120154657.

The product of its digits is 71124480, while the sum is 59.

The spelling of 66445477763 in words is "sixty-six billion, four hundred forty-five million, four hundred seventy-seven thousand, seven hundred sixty-three".