61658487 has 12 divisors (see below), whose sum is σ = 97158984. Its totient is φ = 37368720.

The previous prime is 61658483. The next prime is 61658521. The reversal of 61658487 is 78485616.

It is a happy number.

61658487 is a `hidden beast` number, since 6 + 165 + 8 + 487 = 666.

It is not a de Polignac number, because 61658487 - 2² = 61658483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61658483) 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, 311308 + ... + 311505.

It is an arithmetic number, because the mean of its divisors is an integer number (8096582).

Almost surely, 2^61658487 is an apocalyptic number.

61658487 is a deficient number, since it is larger than the sum of its proper divisors (35500497).

61658487 is a wasteful number, since it uses less digits than its factorization.

61658487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622830 (or 622827 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 61658487 is about 7852.2918310516. The cubic root of 61658487 is about 395.0611174991.

The spelling of 61658487 in words is "sixty-one million, six hundred fifty-eight thousand, four hundred eighty-seven".