140666436 has 48 divisors (see below), whose sum is σ = 380553600. Its totient is φ = 44849376.

The previous prime is 140666431. The next prime is 140666447. The reversal of 140666436 is 634666041.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 140666436.

It is not an unprimeable number, because it can be changed into a prime (140666431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25831 + ... + 30798.

It is an arithmetic number, because the mean of its divisors is an integer number (7928200).

Almost surely, 2^140666436 is an apocalyptic number.

It is an amenable number.

140666436 is an abundant number, since it is smaller than the sum of its proper divisors (239887164).

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

140666436 is a wasteful number, since it uses less digits than its factorization.

140666436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56665 (or 56657 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 140666436 is about 11860.2881921141. The cubic root of 140666436 is about 520.0720265121.

It can be divided in two parts, 14066 and 6436, that added together give a palindrome (20502).

The spelling of 140666436 in words is "one hundred forty million, six hundred sixty-six thousand, four hundred thirty-six".