66901093 has 4 divisors (see below), whose sum is σ = 76458400. Its totient is φ = 57343788.

The previous prime is 66901067. The next prime is 66901097. The reversal of 66901093 is 39010966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39010966 = 2 ⋅19505483.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66901093 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 (66901097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4778643 + ... + 4778656.

It is an arithmetic number, because the mean of its divisors is an integer number (19114600).

Almost surely, 2^66901093 is an apocalyptic number.

It is an amenable number.

66901093 is a deficient number, since it is larger than the sum of its proper divisors (9557307).

66901093 is an equidigital number, since it uses as much as digits as its factorization.

66901093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9557306.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 66901093 is about 8179.3088338808. The cubic root of 66901093 is about 405.9548531419.

The spelling of 66901093 in words is "sixty-six million, nine hundred one thousand, ninety-three".