66750634 has 8 divisors (see below), whose sum is σ = 103578660. Its totient is φ = 32224416.

The previous prime is 66750613. The next prime is 66750637. The reversal of 66750634 is 43605766.

It can be written as a sum of positive squares in 2 ways, for example, as 65658609 + 1092025 = 8103^2 + 1045^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 66750593 and 66750602.

It is not an unprimeable number, because it can be changed into a prime (66750637) 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, 575379 + ... + 575494.

Almost surely, 2^66750634 is an apocalyptic number.

66750634 is a deficient number, since it is larger than the sum of its proper divisors (36828026).

66750634 is a wasteful number, since it uses less digits than its factorization.

66750634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150904.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 66750634 is about 8170.1061192619. The cubic root of 66750634 is about 405.6502970446.

The spelling of 66750634 in words is "sixty-six million, seven hundred fifty thousand, six hundred thirty-four".