66357494 has 16 divisors (see below), whose sum is σ = 120447648. Its totient is φ = 26765952.

The previous prime is 66357491. The next prime is 66357497. The reversal of 66357494 is 49475366.

It is an interprime number because it is at equal distance from previous prime (66357491) and next prime (66357497).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66357491) 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, 139169 + ... + 139644.

It is an arithmetic number, because the mean of its divisors is an integer number (7527978).

Almost surely, 2^66357494 is an apocalyptic number.

66357494 is a deficient number, since it is larger than the sum of its proper divisors (54090154).

66357494 is a wasteful number, since it uses less digits than its factorization.

66357494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278839.

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

The square root of 66357494 is about 8146.0109256003. The cubic root of 66357494 is about 404.8523446907.

The spelling of 66357494 in words is "sixty-six million, three hundred fifty-seven thousand, four hundred ninety-four".