66716614 has 4 divisors (see below), whose sum is σ = 100074924. Its totient is φ = 33358306.

The previous prime is 66716609. The next prime is 66716621. The reversal of 66716614 is 41661766.

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

It is a super-2 number, since 2×66716614² = 8902213167249992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16679152 + ... + 16679155.

It is an arithmetic number, because the mean of its divisors is an integer number (25018731).

Almost surely, 2^66716614 is an apocalyptic number.

66716614 is a deficient number, since it is larger than the sum of its proper divisors (33358310).

66716614 is a wasteful number, since it uses less digits than its factorization.

66716614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33358309.

The product of its digits is 36288, while the sum is 37.

The square root of 66716614 is about 8168.0238736184. The cubic root of 66716614 is about 405.5813710164.

The spelling of 66716614 in words is "sixty-six million, seven hundred sixteen thousand, six hundred fourteen".