66315427 has 4 divisors (see below), whose sum is σ = 66344776. Its totient is φ = 66286080.

The previous prime is 66315407. The next prime is 66315437. The reversal of 66315427 is 72451366.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66315427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66315392 and 66315401.

It is not an unprimeable number, because it can be changed into a prime (66315407) 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, 10974 + ... + 15907.

It is an arithmetic number, because the mean of its divisors is an integer number (16586194).

Almost surely, 2^66315427 is an apocalyptic number.

66315427 is a deficient number, since it is larger than the sum of its proper divisors (29349).

66315427 is a wasteful number, since it uses less digits than its factorization.

66315427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29348.

The product of its digits is 30240, while the sum is 34.

The square root of 66315427 is about 8143.4284548954. The cubic root of 66315427 is about 404.7667752360.

The spelling of 66315427 in words is "sixty-six million, three hundred fifteen thousand, four hundred twenty-seven".