33440661 has 16 divisors (see below), whose sum is σ = 51141120. Its totient is φ = 21574080.

The previous prime is 33440657. The next prime is 33440663. The reversal of 33440661 is 16604433.

It is not a de Polignac number, because 33440661 - 2² = 33440657 is a prime.

It is a super-2 number, since 2×33440661² = 2236555616233842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33440663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19140 + ... + 20813.

It is an arithmetic number, because the mean of its divisors is an integer number (3196320).

Almost surely, 2^33440661 is an apocalyptic number.

33440661 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33440661 is a deficient number, since it is larger than the sum of its proper divisors (17700459).

33440661 is a wasteful number, since it uses less digits than its factorization.

33440661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39993 (or 39987 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 33440661 is about 5782.7900705455. The cubic root of 33440661 is about 322.1748372167.

The spelling of 33440661 in words is "thirty-three million, four hundred forty thousand, six hundred sixty-one".