61706557 has 8 divisors (see below), whose sum is σ = 67408992. Its totient is φ = 56019600.

The previous prime is 61706551. The next prime is 61706573. The reversal of 61706557 is 75560716.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61706557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61706551) 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, 5463 + ... + 12379.

It is an arithmetic number, because the mean of its divisors is an integer number (8426124).

Almost surely, 2^61706557 is an apocalyptic number.

It is an amenable number.

61706557 is a deficient number, since it is larger than the sum of its proper divisors (5702435).

61706557 is a wasteful number, since it uses less digits than its factorization.

61706557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7739.

The product of its (nonzero) digits is 44100, while the sum is 37.

The square root of 61706557 is about 7855.3521245072. The cubic root of 61706557 is about 395.1637562752.

The spelling of 61706557 in words is "sixty-one million, seven hundred six thousand, five hundred fifty-seven".