61660115 has 8 divisors (see below), whose sum is σ = 80718768. Its totient is φ = 44843680.

The previous prime is 61660103. The next prime is 61660127. The reversal of 61660115 is 51106616.

It is an interprime number because it is at equal distance from previous prime (61660103) and next prime (61660127).

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

It is not a de Polignac number, because 61660115 - 2⁶ = 61660051 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560492 + ... + 560601.

It is an arithmetic number, because the mean of its divisors is an integer number (10089846).

Almost surely, 2^61660115 is an apocalyptic number.

61660115 is a deficient number, since it is larger than the sum of its proper divisors (19058653).

61660115 is a wasteful number, since it uses less digits than its factorization.

61660115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121109.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61660115 is about 7852.3954943699. The cubic root of 61660115 is about 395.0645944675.

It can be divided in two parts, 616601 and 15, that added together give a palindrome (616616).

The spelling of 61660115 in words is "sixty-one million, six hundred sixty thousand, one hundred fifteen".