66566647414 has 8 divisors (see below), whose sum is σ = 105723498888. Its totient is φ = 31325481120.

The previous prime is 66566647333. The next prime is 66566647429. The reversal of 66566647414 is 41474666566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66566647414² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 978921252 + ... + 978921319.

It is an arithmetic number, because the mean of its divisors is an integer number (13215437361).

Almost surely, 2^66566647414 is an apocalyptic number.

66566647414 is a deficient number, since it is larger than the sum of its proper divisors (39156851474).

66566647414 is a wasteful number, since it uses less digits than its factorization.

66566647414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957842590.

The product of its digits is 17418240, while the sum is 55.

The spelling of 66566647414 in words is "sixty-six billion, five hundred sixty-six million, six hundred forty-seven thousand, four hundred fourteen".