66957434 has 8 divisors (see below), whose sum is σ = 100473780. Its totient is φ = 33466176.

The previous prime is 66957431. The next prime is 66957437. The reversal of 66957434 is 43475966.

It is an interprime number because it is at equal distance from previous prime (66957431) and next prime (66957437).

It can be written as a sum of positive squares in 2 ways, for example, as 47128225 + 19829209 = 6865^2 + 4453^2 .

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 (66957431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3362 + ... + 12050.

Almost surely, 2^66957434 is an apocalyptic number.

66957434 is a deficient number, since it is larger than the sum of its proper divisors (33516346).

66957434 is a wasteful number, since it uses less digits than its factorization.

66957434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12544.

The product of its digits is 544320, while the sum is 44.

The square root of 66957434 is about 8182.7522264822. The cubic root of 66957434 is about 406.0687799544.

The spelling of 66957434 in words is "sixty-six million, nine hundred fifty-seven thousand, four hundred thirty-four".