66441566145511 has 8 divisors (see below), whose sum is σ = 69338666068704. Its totient is φ = 63545160903840.

The previous prime is 66441566145481. The next prime is 66441566145527. The reversal of 66441566145511 is 11554166514466.

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 66441566145511 - 2¹³ = 66441566137319 is a prime.

It is a super-2 number, since 2×66441566145511² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66441566125511) 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, 173474920 + ... + 173857501.

It is an arithmetic number, because the mean of its divisors is an integer number (8667333258588).

Almost surely, 2^{66441566145511} is an apocalyptic number.

66441566145511 is a deficient number, since it is larger than the sum of its proper divisors (2897099923193).

66441566145511 is a wasteful number, since it uses less digits than its factorization.

66441566145511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347340761.

The product of its digits is 10368000, while the sum is 55.

The spelling of 66441566145511 in words is "sixty-six trillion, four hundred forty-one billion, five hundred sixty-six million, one hundred forty-five thousand, five hundred eleven".