66962749 has 8 divisors (see below), whose sum is σ = 76893248. Its totient is φ = 57123360.

The previous prime is 66962743. The next prime is 66962767. The reversal of 66962749 is 94726966.

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

It is not a de Polignac number, because 66962749 - 2¹⁹ = 66438461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66962743) 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, 21192 + ... + 24145.

It is an arithmetic number, because the mean of its divisors is an integer number (9611656).

Almost surely, 2^66962749 is an apocalyptic number.

It is an amenable number.

66962749 is a deficient number, since it is larger than the sum of its proper divisors (9930499).

66962749 is a wasteful number, since it uses less digits than its factorization.

66962749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45555.

The product of its digits is 979776, while the sum is 49.

The square root of 66962749 is about 8183.0769885172. The cubic root of 66962749 is about 406.0795240861.

The spelling of 66962749 in words is "sixty-six million, nine hundred sixty-two thousand, seven hundred forty-nine".