61320066 has 8 divisors (see below), whose sum is σ = 122640144. Its totient is φ = 20440020.

The previous prime is 61320041. The next prime is 61320079. The reversal of 61320066 is 66002316.

It is a sphenic number, since it is the product of 3 distinct primes.

61320066 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5110000 + ... + 5110011.

It is an arithmetic number, because the mean of its divisors is an integer number (15330018).

Almost surely, 2^61320066 is an apocalyptic number.

61320066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

61320066 is a wasteful number, since it uses less digits than its factorization.

61320066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220016.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 61320066 is about 7830.7129943575. The cubic root of 61320066 is about 394.3370088470.

The spelling of 61320066 in words is "sixty-one million, three hundred twenty thousand, sixty-six".