66904269 has 4 divisors (see below), whose sum is σ = 89205696. Its totient is φ = 44602844.

The previous prime is 66904267. The next prime is 66904283. The reversal of 66904269 is 96240966.

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 a cyclic number.

It is not a de Polignac number, because 66904269 - 2¹ = 66904267 is a prime.

It is a super-2 number, since 2×66904269² = 8952362420848722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66904269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66904261) 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, 11150709 + ... + 11150714.

It is an arithmetic number, because the mean of its divisors is an integer number (22301424).

Almost surely, 2^66904269 is an apocalyptic number.

It is an amenable number.

66904269 is a deficient number, since it is larger than the sum of its proper divisors (22301427).

66904269 is a wasteful number, since it uses less digits than its factorization.

66904269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22301426.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 66904269 is about 8179.5029800105. The cubic root of 66904269 is about 405.9612770141.

The spelling of 66904269 in words is "sixty-six million, nine hundred four thousand, two hundred sixty-nine".