61607771 has 2 divisors, whose sum is σ = 61607772. Its totient is φ = 61607770.

The previous prime is 61607753. The next prime is 61607801. The reversal of 61607771 is 17770616.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61607771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61607171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30803885 + 30803886.

It is an arithmetic number, because the mean of its divisors is an integer number (30803886).

Almost surely, 2^61607771 is an apocalyptic number.

61607771 is the 4196-th centered heptagonal number.

61607771 is a deficient number, since it is larger than the sum of its proper divisors (1).

61607771 is an equidigital number, since it uses as much as digits as its factorization.

61607771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 61607771 is about 7849.0617910678. The cubic root of 61607771 is about 394.9527711518.

It can be divided in two parts, 6160 and 7771, that added together give a palindrome (13931).

The spelling of 61607771 in words is "sixty-one million, six hundred seven thousand, seven hundred seventy-one".