256015066 has 8 divisors (see below), whose sum is σ = 389431584. Its totient is φ = 126204540.

The previous prime is 256015061. The next prime is 256015073. The reversal of 256015066 is 660510652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (256015061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901320 + ... + 901603.

It is an arithmetic number, because the mean of its divisors is an integer number (48678948).

Almost surely, 2^256015066 is an apocalyptic number.

256015066 is a deficient number, since it is larger than the sum of its proper divisors (133416518).

256015066 is a wasteful number, since it uses less digits than its factorization.

256015066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802996.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 256015066 is about 16000.4708055732. The cubic root of 256015066 is about 634.9728766806.

The spelling of 256015066 in words is "two hundred fifty-six million, fifteen thousand, sixty-six".