66713331 has 8 divisors (see below), whose sum is σ = 91355344. Its totient is φ = 43273440.

The previous prime is 66713303. The next prime is 66713359. The reversal of 66713331 is 13331766.

It is an interprime number because it is at equal distance from previous prime (66713303) and next prime (66713359).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66713331 - 2⁶ = 66713267 is a prime.

It is a super-2 number, since 2×66713331² = 8901337066231122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66713371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300400 + ... + 300621.

It is an arithmetic number, because the mean of its divisors is an integer number (11419418).

Almost surely, 2^66713331 is an apocalyptic number.

66713331 is a deficient number, since it is larger than the sum of its proper divisors (24642013).

66713331 is a wasteful number, since it uses less digits than its factorization.

66713331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601061.

The product of its digits is 6804, while the sum is 30.

The square root of 66713331 is about 8167.8229045444. The cubic root of 66713331 is about 405.5747182733.

The spelling of 66713331 in words is "sixty-six million, seven hundred thirteen thousand, three hundred thirty-one".