666066151505 has 4 divisors (see below), whose sum is σ = 799279381812. Its totient is φ = 532852921200.

The previous prime is 666066151463. The next prime is 666066151529. The reversal of 666066151505 is 505151660666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505151660666 = 2 ⋅252575830333.

It can be written as a sum of positive squares in 2 ways, for example, as 411050241424 + 255015910081 = 641132^2 + 504991^2 .

It is not a de Polignac number, because 666066151505 - 2¹⁴ = 666066135121 is a prime.

It is a super-2 number, since 2×666066151505² (a number of 24 digits) contains 22 as substring.

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 666066151505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66606615146 + ... + 66606615155.

It is an arithmetic number, because the mean of its divisors is an integer number (199819845453).

Almost surely, 2^666066151505 is an apocalyptic number.

It is an amenable number.

666066151505 is a deficient number, since it is larger than the sum of its proper divisors (133213230307).

666066151505 is a wasteful number, since it uses less digits than its factorization.

666066151505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133213230306.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 666066151505 in words is "six hundred sixty-six billion, sixty-six million, one hundred fifty-one thousand, five hundred five".