66412063 has 4 divisors (see below), whose sum is σ = 69299568. Its totient is φ = 63524560.

The previous prime is 66412057. The next prime is 66412069. The reversal of 66412063 is 36021466.

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

It is an interprime number because it is at equal distance from previous prime (66412057) and next prime (66412069).

It is a cyclic number.

It is not a de Polignac number, because 66412063 - 2⁹ = 66411551 is a prime.

It is a super-2 number, since 2×66412063² = 8821124223831938, 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 (66412069) 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, 1443718 + ... + 1443763.

It is an arithmetic number, because the mean of its divisors is an integer number (17324892).

Almost surely, 2^66412063 is an apocalyptic number.

66412063 is a deficient number, since it is larger than the sum of its proper divisors (2887505).

66412063 is a wasteful number, since it uses less digits than its factorization.

66412063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887504.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66412063 is about 8149.3596680966. The cubic root of 66412063 is about 404.9632908861.

The spelling of 66412063 in words is "sixty-six million, four hundred twelve thousand, sixty-three".