61766145 has 40 divisors (see below), whose sum is σ = 126544704. Its totient is φ = 28234656.

The previous prime is 61766141. The next prime is 61766171. The reversal of 61766145 is 54166716.

61766145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61766145 - 2² = 61766141 is a prime.

It is a super-2 number, since 2×61766145² = 7630113336322050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61766141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8059 + ... + 13728.

Almost surely, 2^61766145 is an apocalyptic number.

It is an amenable number.

61766145 is an abundant number, since it is smaller than the sum of its proper divisors (64778559).

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

61766145 is a wasteful number, since it uses less digits than its factorization.

61766145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21811 (or 21802 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 61766145 is about 7859.1440373618. The cubic root of 61766145 is about 395.2909142499.

It can be divided in two parts, 6176 and 6145, that added together give a palindrome (12321).

The spelling of 61766145 in words is "sixty-one million, seven hundred sixty-six thousand, one hundred forty-five".