66310427 has 4 divisors (see below), whose sum is σ = 66585816. Its totient is φ = 66035040.

The previous prime is 66310423. The next prime is 66310459. The reversal of 66310427 is 72401366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66310427 - 2² = 66310423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66310427.

It is not an unprimeable number, because it can be changed into a prime (66310423) 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, 137333 + ... + 137814.

It is an arithmetic number, because the mean of its divisors is an integer number (16646454).

Almost surely, 2^66310427 is an apocalyptic number.

66310427 is a deficient number, since it is larger than the sum of its proper divisors (275389).

66310427 is a wasteful number, since it uses less digits than its factorization.

66310427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275388.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 66310427 is about 8143.1214531038. The cubic root of 66310427 is about 404.7566022147.

The spelling of 66310427 in words is "sixty-six million, three hundred ten thousand, four hundred twenty-seven".