66613087 has 12 divisors (see below), whose sum is σ = 69749680. Its totient is φ = 63608832.

The previous prime is 66613081. The next prime is 66613097. The reversal of 66613087 is 78031666.

It is a de Polignac number, because none of the positive numbers 2^k-66613087 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66613081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86239 + ... + 87007.

Almost surely, 2^66613087 is an apocalyptic number.

66613087 is a deficient number, since it is larger than the sum of its proper divisors (3136593).

66613087 is a wasteful number, since it uses less digits than its factorization.

66613087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 66613087 is about 8161.6840786691. The cubic root of 66613087 is about 405.3714764723.

The spelling of 66613087 in words is "sixty-six million, six hundred thirteen thousand, eighty-seven".