66497587 has 8 divisors (see below), whose sum is σ = 75382160. Its totient is φ = 58151520.

The previous prime is 66497579. The next prime is 66497593. The reversal of 66497587 is 78579466.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66497587 - 2³ = 66497579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66497537) 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, 134364 + ... + 134857.

It is an arithmetic number, because the mean of its divisors is an integer number (9422770).

Almost surely, 2^66497587 is an apocalyptic number.

66497587 is a deficient number, since it is larger than the sum of its proper divisors (8884573).

66497587 is a wasteful number, since it uses less digits than its factorization.

66497587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269253.

The product of its digits is 2540160, while the sum is 52.

The square root of 66497587 is about 8154.6052632853. The cubic root of 66497587 is about 405.1370506046.

The spelling of 66497587 in words is "sixty-six million, four hundred ninety-seven thousand, five hundred eighty-seven".