61966321 has 4 divisors (see below), whose sum is σ = 62290944. Its totient is φ = 61641700.

The previous prime is 61966313. The next prime is 61966337. The reversal of 61966321 is 12366916.

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 61966321 - 2³ = 61966313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61966361) 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, 162025 + ... + 162406.

It is an arithmetic number, because the mean of its divisors is an integer number (15572736).

Almost surely, 2^61966321 is an apocalyptic number.

It is an amenable number.

61966321 is a deficient number, since it is larger than the sum of its proper divisors (324623).

61966321 is a wasteful number, since it uses less digits than its factorization.

61966321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324622.

The product of its digits is 11664, while the sum is 34.

The square root of 61966321 is about 7871.8689648647. The cubic root of 61966321 is about 395.7174824868.

The spelling of 61966321 in words is "sixty-one million, nine hundred sixty-six thousand, three hundred twenty-one".