61615066 has 16 divisors (see below), whose sum is σ = 94454784. Its totient is φ = 30137184.

The previous prime is 61615061. The next prime is 61615067. The reversal of 61615066 is 66051616.

It is a super-3 number, since 3×61615066³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61615061) 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, 16881 + ... + 20203.

It is an arithmetic number, because the mean of its divisors is an integer number (5903424).

Almost surely, 2^61615066 is an apocalyptic number.

61615066 is a deficient number, since it is larger than the sum of its proper divisors (32839718).

61615066 is a wasteful number, since it uses less digits than its factorization.

61615066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 61615066 is about 7849.5264825338. The cubic root of 61615066 is about 394.9683593734.

The spelling of 61615066 in words is "sixty-one million, six hundred fifteen thousand, sixty-six".