61660033 has 8 divisors (see below), whose sum is σ = 65302848. Its totient is φ = 58097424.

The previous prime is 61660031. The next prime is 61660043. The reversal of 61660033 is 33006616.

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 61660033 - 2¹ = 61660031 is a prime.

It is a super-2 number, since 2×61660033² = 7603919339122178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61660031) 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, 18466 + ... + 21547.

It is an arithmetic number, because the mean of its divisors is an integer number (8162856).

Almost surely, 2^61660033 is an apocalyptic number.

It is an amenable number.

61660033 is a deficient number, since it is larger than the sum of its proper divisors (3642815).

61660033 is a wasteful number, since it uses less digits than its factorization.

61660033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40103.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 61660033 is about 7852.3902730315. The cubic root of 61660033 is about 395.0644193391.

Adding to 61660033 its reverse (33006616), we get a palindrome (94666649).

The spelling of 61660033 in words is "sixty-one million, six hundred sixty thousand, thirty-three".