66614869 has 4 divisors (see below), whose sum is σ = 68164096. Its totient is φ = 65065644.

The previous prime is 66614833. The next prime is 66614881. The reversal of 66614869 is 96841666.

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 66614869 - 2¹³ = 66606677 is a prime.

It is a super-2 number, since 2×66614869² = 8875081543774322, which 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 (66614819) 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, 774549 + ... + 774634.

It is an arithmetic number, because the mean of its divisors is an integer number (17041024).

Almost surely, 2^66614869 is an apocalyptic number.

It is an amenable number.

66614869 is a deficient number, since it is larger than the sum of its proper divisors (1549227).

66614869 is a wasteful number, since it uses less digits than its factorization.

66614869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549226.

The product of its digits is 373248, while the sum is 46.

The square root of 66614869 is about 8161.7932465850. The cubic root of 66614869 is about 405.3750912051.

The spelling of 66614869 in words is "sixty-six million, six hundred fourteen thousand, eight hundred sixty-nine".