66723142525 has 24 divisors (see below), whose sum is σ = 89802696704. Its totient is φ = 48884472000.

The previous prime is 66723142513. The next prime is 66723142583. The reversal of 66723142525 is 52524132766.

It is not a de Polignac number, because 66723142525 - 2¹³ = 66723134333 is a prime.

It is a super-2 number, since 2×66723142525² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 767001 + ... + 849550.

Almost surely, 2^66723142525 is an apocalyptic number.

66723142525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66723142525 is a deficient number, since it is larger than the sum of its proper divisors (23079554179).

66723142525 is a wasteful number, since it uses less digits than its factorization.

66723142525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616701 (or 1616696 counting only the distinct ones).

The product of its digits is 604800, while the sum is 43.

The spelling of 66723142525 in words is "sixty-six billion, seven hundred twenty-three million, one hundred forty-two thousand, five hundred twenty-five".