33566401 has 4 divisors (see below), whose sum is σ = 36617904. Its totient is φ = 30514900.

The previous prime is 33566399. The next prime is 33566419. The reversal of 33566401 is 10466533.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33566401 - 2¹ = 33566399 is a prime.

It is a super-2 number, since 2×33566401² = 2253406552185602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33566401.

It is not an unprimeable number, because it can be changed into a prime (33566431) 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, 1525735 + ... + 1525756.

It is an arithmetic number, because the mean of its divisors is an integer number (9154476).

Almost surely, 2^33566401 is an apocalyptic number.

It is an amenable number.

33566401 is a deficient number, since it is larger than the sum of its proper divisors (3051503).

33566401 is a wasteful number, since it uses less digits than its factorization.

33566401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051502.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 33566401 is about 5793.6517844965. The cubic root of 33566401 is about 322.5781346247.

The spelling of 33566401 in words is "thirty-three million, five hundred sixty-six thousand, four hundred one".