665151055 has 8 divisors (see below), whose sum is σ = 805641552. Its totient is φ = 527147328.

The previous prime is 665151043. The next prime is 665151079. The reversal of 665151055 is 550151566.

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 665151055 - 2¹¹ = 665149007 is a prime.

It is a super-2 number, since 2×665151055² = 884851851935226050, which 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 665151055.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 621102 + ... + 622171.

It is an arithmetic number, because the mean of its divisors is an integer number (100705194).

Almost surely, 2^665151055 is an apocalyptic number.

665151055 is a deficient number, since it is larger than the sum of its proper divisors (140490497).

665151055 is a wasteful number, since it uses less digits than its factorization.

665151055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243385.

The product of its (nonzero) digits is 22500, while the sum is 34.

The square root of 665151055 is about 25790.5225809792. The cubic root of 665151055 is about 872.9179580589.

The spelling of 665151055 in words is "six hundred sixty-five million, one hundred fifty-one thousand, fifty-five".