61616611 has 4 divisors (see below), whose sum is σ = 70418992. Its totient is φ = 52814232.

The previous prime is 61616587. The next prime is 61616629. The reversal of 61616611 is 11661616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61616611 is a prime.

It is a super-2 number, since 2×61616611² = 7593213502250642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61616611.

It is not an unprimeable number, because it can be changed into a prime (61616641) 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, 4401180 + ... + 4401193.

It is an arithmetic number, because the mean of its divisors is an integer number (17604748).

Almost surely, 2^61616611 is an apocalyptic number.

61616611 is a deficient number, since it is larger than the sum of its proper divisors (8802381).

61616611 is an equidigital number, since it uses as much as digits as its factorization.

61616611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8802380.

The product of its digits is 1296, while the sum is 28.

The square root of 61616611 is about 7849.6248954966. The cubic root of 61616611 is about 394.9716606277.

The spelling of 61616611 in words is "sixty-one million, six hundred sixteen thousand, six hundred eleven".