66970757 has 8 divisors (see below), whose sum is σ = 79007232. Its totient is φ = 55551600.

The previous prime is 66970699. The next prime is 66970759. The reversal of 66970757 is 75707966.

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

It is a cyclic number.

It is not a de Polignac number, because 66970757 - 2¹² = 66966661 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 (66970759) 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, 154094 + ... + 154527.

It is an arithmetic number, because the mean of its divisors is an integer number (9875904).

Almost surely, 2^66970757 is an apocalyptic number.

It is an amenable number.

66970757 is a deficient number, since it is larger than the sum of its proper divisors (12036475).

66970757 is a wasteful number, since it uses less digits than its factorization.

66970757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308659.

The product of its (nonzero) digits is 555660, while the sum is 47.

The square root of 66970757 is about 8183.5662763859. The cubic root of 66970757 is about 406.0957109724.

The spelling of 66970757 in words is "sixty-six million, nine hundred seventy thousand, seven hundred fifty-seven".