666603050155 has 16 divisors (see below), whose sum is σ = 929185331904. Its totient is φ = 449605802880.

The previous prime is 666603050149. The next prime is 666603050171. The reversal of 666603050155 is 551050306666.

666603050155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 666603050155 - 2⁷ = 666603050027 is a prime.

It is a Duffinian number.

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, 156110992 + ... + 156115261.

It is an arithmetic number, because the mean of its divisors is an integer number (58074083244).

Almost surely, 2^666603050155 is an apocalyptic number.

666603050155 is a deficient number, since it is larger than the sum of its proper divisors (262582281749).

666603050155 is a wasteful number, since it uses less digits than its factorization.

666603050155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312226326.

The product of its (nonzero) digits is 486000, while the sum is 43.

The spelling of 666603050155 in words is "six hundred sixty-six billion, six hundred three million, fifty thousand, one hundred fifty-five".