61650761 has 4 divisors (see below), whose sum is σ = 61666500. Its totient is φ = 61635024.

The previous prime is 61650709. The next prime is 61650821. The reversal of 61650761 is 16705616.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 48372025 + 13278736 = 6955^2 + 3644^2 .

It is a cyclic number.

It is not a de Polignac number, because 61650761 - 2⁶ = 61650697 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61650161) 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, 3155 + ... + 11543.

It is an arithmetic number, because the mean of its divisors is an integer number (15416625).

Almost surely, 2^61650761 is an apocalyptic number.

It is an amenable number.

61650761 is a deficient number, since it is larger than the sum of its proper divisors (15739).

61650761 is an equidigital number, since it uses as much as digits as its factorization.

61650761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15738.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 61650761 is about 7851.7998573575. The cubic root of 61650761 is about 395.0446160147.

The spelling of 61650761 in words is "sixty-one million, six hundred fifty thousand, seven hundred sixty-one".