140666520 has 64 divisors (see below), whose sum is σ = 422968320. Its totient is φ = 37425024.

The previous prime is 140666507. The next prime is 140666521. The reversal of 140666520 is 25666041.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140666521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64569 + ... + 66711.

It is an arithmetic number, because the mean of its divisors is an integer number (6608880).

Almost surely, 2^140666520 is an apocalyptic number.

140666520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140666520 is an abundant number, since it is smaller than the sum of its proper divisors (282301800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140666520 is a wasteful number, since it uses less digits than its factorization.

140666520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704 (or 2700 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 140666520 is about 11860.2917333428. The cubic root of 140666520 is about 520.0721300337.

The spelling of 140666520 in words is "one hundred forty million, six hundred sixty-six thousand, five hundred twenty".