66453747510 has 128 divisors (see below), whose sum is σ = 175092793344. Its totient is φ = 16089891840.

The previous prime is 66453747497. The next prime is 66453747571. The reversal of 66453747510 is 1574735466.

It is a happy number.

It is a super-2 number, since 2×66453747510² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66453747510.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1014987 + ... + 1078473.

It is an arithmetic number, because the mean of its divisors is an integer number (1367912448).

Almost surely, 2^66453747510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66453747510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87546396672).

66453747510 is an abundant number, since it is smaller than the sum of its proper divisors (108639045834).

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

66453747510 is a wasteful number, since it uses less digits than its factorization.

66453747510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63598.

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 66453747510 in words is "sixty-six billion, four hundred fifty-three million, seven hundred forty-seven thousand, five hundred ten".