66916754 has 8 divisors (see below), whose sum is σ = 100477260. Its totient is φ = 33424336.

The previous prime is 66916753. The next prime is 66916769. The reversal of 66916754 is 45761966.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35724529 + 31192225 = 5977^2 + 5585^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66916753) 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, 14489 + ... + 18540.

Almost surely, 2^66916754 is an apocalyptic number.

66916754 is a deficient number, since it is larger than the sum of its proper divisors (33560506).

66916754 is a wasteful number, since it uses less digits than its factorization.

66916754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34044.

The product of its digits is 272160, while the sum is 44.

The square root of 66916754 is about 8180.2661325901. The cubic root of 66916754 is about 405.9865275768.

The spelling of 66916754 in words is "sixty-six million, nine hundred sixteen thousand, seven hundred fifty-four".