61667120 has 20 divisors (see below), whose sum is σ = 143376240. Its totient is φ = 24666816.

The previous prime is 61667113. The next prime is 61667129. The reversal of 61667120 is 2176616.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (61667129) 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, 385340 + ... + 385499.

It is an arithmetic number, because the mean of its divisors is an integer number (7168812).

Almost surely, 2^61667120 is an apocalyptic number.

It is an amenable number.

61667120 is an abundant number, since it is smaller than the sum of its proper divisors (81709120).

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

61667120 is a wasteful number, since it uses less digits than its factorization.

61667120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770852 (or 770846 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 61667120 is about 7852.8415239326. The cubic root of 61667120 is about 395.0795545580.

The spelling of 61667120 in words is "sixty-one million, six hundred sixty-seven thousand, one hundred twenty".