61664412 has 36 divisors (see below), whose sum is σ = 146386968. Its totient is φ = 20203200.

The previous prime is 61664401. The next prime is 61664417. The reversal of 61664412 is 21446616.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 61664412.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 43962 + ... + 45342.

Almost surely, 2^61664412 is an apocalyptic number.

It is an amenable number.

61664412 is an abundant number, since it is smaller than the sum of its proper divisors (84722556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61664412 is a wasteful number, since it uses less digits than its factorization.

61664412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510 (or 1447 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 61664412 is about 7852.6691003760. The cubic root of 61664412 is about 395.0737714054.

The spelling of 61664412 in words is "sixty-one million, six hundred sixty-four thousand, four hundred twelve".