256072066 has 8 divisors (see below), whose sum is σ = 384344064. Its totient is φ = 127957380.

The previous prime is 256072051. The next prime is 256072073. The reversal of 256072066 is 660270652.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35170 + ... + 41821.

It is an arithmetic number, because the mean of its divisors is an integer number (48043008).

Almost surely, 2^256072066 is an apocalyptic number.

256072066 is a deficient number, since it is larger than the sum of its proper divisors (128271998).

256072066 is a wasteful number, since it uses less digits than its factorization.

256072066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78656.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 256072066 is about 16002.2519040290. The cubic root of 256072066 is about 635.0199973036.

The spelling of 256072066 in words is "two hundred fifty-six million, seventy-two thousand, sixty-six".