66969693093 has 4 divisors (see below), whose sum is σ = 89292924128. Its totient is φ = 44646462060.

The previous prime is 66969693083. The next prime is 66969693097. The reversal of 66969693093 is 39039696966.

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.

It is not a de Polignac number, because 66969693093 - 2¹² = 66969688997 is a prime.

It is a super-2 number, since 2×66969693093² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66969693097) 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, 11161615513 + ... + 11161615518.

It is an arithmetic number, because the mean of its divisors is an integer number (22323231032).

Almost surely, 2^66969693093 is an apocalyptic number.

It is an amenable number.

66969693093 is a deficient number, since it is larger than the sum of its proper divisors (22323231035).

66969693093 is a wasteful number, since it uses less digits than its factorization.

66969693093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22323231034.

The product of its (nonzero) digits is 76527504, while the sum is 66.

The spelling of 66969693093 in words is "sixty-six billion, nine hundred sixty-nine million, six hundred ninety-three thousand, ninety-three".