66376663 has 4 divisors (see below), whose sum is σ = 67995648. Its totient is φ = 64757680.

The previous prime is 66376657. The next prime is 66376691. The reversal of 66376663 is 36667366.

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 66376663 - 2⁹ = 66376151 is a prime.

It is a super-2 number, since 2×66376663² = 8811722782031138, 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 (66376603) 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, 809431 + ... + 809512.

It is an arithmetic number, because the mean of its divisors is an integer number (16998912).

Almost surely, 2^66376663 is an apocalyptic number.

66376663 is a deficient number, since it is larger than the sum of its proper divisors (1618985).

66376663 is a wasteful number, since it uses less digits than its factorization.

66376663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618984.

The product of its digits is 489888, while the sum is 43.

The square root of 66376663 is about 8147.1874288002. The cubic root of 66376663 is about 404.8913248016.

The spelling of 66376663 in words is "sixty-six million, three hundred seventy-six thousand, six hundred sixty-three".