56661801 has 8 divisors (see below), whose sum is σ = 86341824. Its totient is φ = 32378160.

The previous prime is 56661791. The next prime is 56661809. The reversal of 56661801 is 10816665.

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

It is not a de Polignac number, because 56661801 - 2¹⁴ = 56645417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56661809) 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, 1349070 + ... + 1349111.

It is an arithmetic number, because the mean of its divisors is an integer number (10792728).

Almost surely, 2^56661801 is an apocalyptic number.

It is an amenable number.

56661801 is a deficient number, since it is larger than the sum of its proper divisors (29680023).

56661801 is a wasteful number, since it uses less digits than its factorization.

56661801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698191.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 56661801 is about 7527.4033371409. The cubic root of 56661801 is about 384.0874570222.

The spelling of 56661801 in words is "fifty-six million, six hundred sixty-one thousand, eight hundred one".