66120743 has 6 divisors (see below), whose sum is σ = 71598384. Its totient is φ = 61034376.

The previous prime is 66120727. The next prime is 66120749. The reversal of 66120743 is 34702166.

It is not a de Polignac number, because 66120743 - 2⁴ = 66120727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66120749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 195455 + ... + 195792.

It is an arithmetic number, because the mean of its divisors is an integer number (11933064).

Almost surely, 2^66120743 is an apocalyptic number.

66120743 is a deficient number, since it is larger than the sum of its proper divisors (5477641).

66120743 is a wasteful number, since it uses less digits than its factorization.

66120743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391273 (or 391260 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 66120743 is about 8131.4662269482. The cubic root of 66120743 is about 404.3702920555.

The spelling of 66120743 in words is "sixty-six million, one hundred twenty thousand, seven hundred forty-three".