61766749 has 12 divisors (see below), whose sum is σ = 68101852. Its totient is φ = 55978560.

The previous prime is 61766741. The next prime is 61766759. The reversal of 61766749 is 94766716.

It can be written as a sum of positive squares in 2 ways, for example, as 25826724 + 35940025 = 5082^2 + 5995^2 .

It is not a de Polignac number, because 61766749 - 2³ = 61766741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61766699 and 61766708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61766741) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 54739 + ... + 55855.

Almost surely, 2^61766749 is an apocalyptic number.

It is an amenable number.

61766749 is a deficient number, since it is larger than the sum of its proper divisors (6335103).

61766749 is a wasteful number, since it uses less digits than its factorization.

61766749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 1585 counting only the distinct ones).

The product of its digits is 381024, while the sum is 46.

The square root of 61766749 is about 7859.1824638444. The cubic root of 61766749 is about 395.2922027386.

It can be divided in two parts, 617667 and 49, that added together give a palindrome (617716).

The spelling of 61766749 in words is "sixty-one million, seven hundred sixty-six thousand, seven hundred forty-nine".