66901087 has 8 divisors (see below), whose sum is σ = 73706832. Its totient is φ = 60216000.

The previous prime is 66901067. The next prime is 66901097. The reversal of 66901087 is 78010966.

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 66901087 - 2⁷ = 66900959 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 (66901067) 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, 28998 + ... + 31219.

It is an arithmetic number, because the mean of its divisors is an integer number (9213354).

Almost surely, 2^66901087 is an apocalyptic number.

66901087 is a deficient number, since it is larger than the sum of its proper divisors (6805745).

66901087 is a wasteful number, since it uses less digits than its factorization.

66901087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60329.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 66901087 is about 8179.3084671016. The cubic root of 66901087 is about 405.9548410060.

It can be divided in two parts, 6690 and 1087, that added together give a palindrome (7777).

The spelling of 66901087 in words is "sixty-six million, nine hundred one thousand, eighty-seven".