19660801 has 8 divisors (see below), whose sum is σ = 21255680. Its totient is φ = 18121968.

The previous prime is 19660799. The next prime is 19660807. The reversal of 19660801 is 10806691.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 19660801 - 2¹ = 19660799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19660807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13281 + ... + 14686.

It is an arithmetic number, because the mean of its divisors is an integer number (2656960).

It is a Proth number, since it is equal to 75 ⋅ 2¹⁸ + 1 and 75 < 2¹⁸.

Almost surely, 2^19660801 is an apocalyptic number.

It is an amenable number.

19660801 is a deficient number, since it is larger than the sum of its proper divisors (1594879).

19660801 is a wasteful number, since it uses less digits than its factorization.

19660801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28023.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 19660801 is about 4434.0501801400. The cubic root of 19660801 is about 269.8984574725.

The spelling of 19660801 in words is "nineteen million, six hundred sixty thousand, eight hundred one".