66352490645 has 64 divisors (see below), whose sum is σ = 97504321536. Its totient is φ = 42311808000.

The previous prime is 66352490641. The next prime is 66352490663. The reversal of 66352490645 is 54609425366.

It is not a de Polignac number, because 66352490645 - 2² = 66352490641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66352490593 and 66352490602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66352490641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29475770 + ... + 29478020.

It is an arithmetic number, because the mean of its divisors is an integer number (1523505024).

Almost surely, 2^66352490645 is an apocalyptic number.

It is an amenable number.

66352490645 is a deficient number, since it is larger than the sum of its proper divisors (31151830891).

66352490645 is a wasteful number, since it uses less digits than its factorization.

66352490645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 66352490645 in words is "sixty-six billion, three hundred fifty-two million, four hundred ninety thousand, six hundred forty-five".