256952661 has 8 divisors (see below), whose sum is σ = 391546944. Its totient is φ = 146830080.

The previous prime is 256952659. The next prime is 256952681. The reversal of 256952661 is 166259652.

256952661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 256952661 - 2¹ = 256952659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256952651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6117900 + ... + 6117941.

It is an arithmetic number, because the mean of its divisors is an integer number (48943368).

Almost surely, 2^256952661 is an apocalyptic number.

256952661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

256952661 is a deficient number, since it is larger than the sum of its proper divisors (134594283).

256952661 is a wasteful number, since it uses less digits than its factorization.

256952661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12235851.

The product of its digits is 194400, while the sum is 42.

The square root of 256952661 is about 16029.7430110404. The cubic root of 256952661 is about 635.7470786385.

The spelling of 256952661 in words is "two hundred fifty-six million, nine hundred fifty-two thousand, six hundred sixty-one".