61775707 has 8 divisors (see below), whose sum is σ = 74316800. Its totient is φ = 50163624.

The previous prime is 61775699. The next prime is 61775729. The reversal of 61775707 is 70757716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61775707 - 2³ = 61775699 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61775707.

It is not an unprimeable number, because it can be changed into a prime (61775767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232107 + ... + 232372.

It is an arithmetic number, because the mean of its divisors is an integer number (9289600).

Almost surely, 2^61775707 is an apocalyptic number.

61775707 is a deficient number, since it is larger than the sum of its proper divisors (12541093).

61775707 is a wasteful number, since it uses less digits than its factorization.

61775707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464505.

The product of its (nonzero) digits is 72030, while the sum is 40.

The square root of 61775707 is about 7859.7523497881. The cubic root of 61775707 is about 395.3113114901.

Subtracting 61775707 from its reverse (70757716), we obtain a square (8982009 = 2997²).

The spelling of 61775707 in words is "sixty-one million, seven hundred seventy-five thousand, seven hundred seven".