61708761 has 6 divisors (see below), whose sum is σ = 89134890. Its totient is φ = 41139168.

The previous prime is 61708753. The next prime is 61708763. The reversal of 61708761 is 16780716.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46498761 + 15210000 = 6819^2 + 3900^2 .

It is not a de Polignac number, because 61708761 - 2³ = 61708753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61708763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3428256 + ... + 3428273.

It is an arithmetic number, because the mean of its divisors is an integer number (14855815).

Almost surely, 2^61708761 is an apocalyptic number.

It is an amenable number.

61708761 is a deficient number, since it is larger than the sum of its proper divisors (27426129).

61708761 is a wasteful number, since it uses less digits than its factorization.

61708761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6856535 (or 6856532 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 61708761 is about 7855.4924097729. The cubic root of 61708761 is about 395.1684609646.

The spelling of 61708761 in words is "sixty-one million, seven hundred eight thousand, seven hundred sixty-one".