61664411 has 8 divisors (see below), whose sum is σ = 63882000. Its totient is φ = 59452960.

The previous prime is 61664401. The next prime is 61664417. The reversal of 61664411 is 11446616.

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 61664411 - 2¹⁰ = 61663387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61664417) 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, 30665 + ... + 32613.

It is an arithmetic number, because the mean of its divisors is an integer number (7985250).

Almost surely, 2^61664411 is an apocalyptic number.

61664411 is a deficient number, since it is larger than the sum of its proper divisors (2217589).

61664411 is a wasteful number, since it uses less digits than its factorization.

61664411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069.

The product of its digits is 3456, while the sum is 29.

The square root of 61664411 is about 7852.6690367034. The cubic root of 61664411 is about 395.0737692698.

The spelling of 61664411 in words is "sixty-one million, six hundred sixty-four thousand, four hundred eleven".