66151569395 has 16 divisors (see below), whose sum is σ = 80845532352. Its totient is φ = 51951889920.

The previous prime is 66151569359. The next prime is 66151569409. The reversal of 66151569395 is 59396515166.

It is a happy number.

It is not a de Polignac number, because 66151569395 - 2¹⁸ = 66151307251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66151569395.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317162 + ... + 482591.

It is an arithmetic number, because the mean of its divisors is an integer number (5052845772).

Almost surely, 2^66151569395 is an apocalyptic number.

66151569395 is a deficient number, since it is larger than the sum of its proper divisors (14693962957).

66151569395 is a wasteful number, since it uses less digits than its factorization.

66151569395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800062.

The product of its digits is 6561000, while the sum is 56.

The spelling of 66151569395 in words is "sixty-six billion, one hundred fifty-one million, five hundred sixty-nine thousand, three hundred ninety-five".