61662487 has 2 divisors, whose sum is σ = 61662488. Its totient is φ = 61662486.

The previous prime is 61662481. The next prime is 61662529. The reversal of 61662487 is 78426616.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61662487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61662481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30831243 + 30831244.

It is an arithmetic number, because the mean of its divisors is an integer number (30831244).

Almost surely, 2^61662487 is an apocalyptic number.

61662487 is a deficient number, since it is larger than the sum of its proper divisors (1).

61662487 is an equidigital number, since it uses as much as digits as its factorization.

61662487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 61662487 is about 7852.5465296297. The cubic root of 61662487 is about 395.0696603095.

The spelling of 61662487 in words is "sixty-one million, six hundred sixty-two thousand, four hundred eighty-seven".