140140665 has 64 divisors (see below), whose sum is σ = 291755520. Its totient is φ = 62484480.

The previous prime is 140140621. The next prime is 140140669. The reversal of 140140665 is 566041041.

It is not a de Polignac number, because 140140665 - 2⁹ = 140140153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (140140669) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36937 + ... + 40553.

It is an arithmetic number, because the mean of its divisors is an integer number (4558680).

Almost surely, 2^140140665 is an apocalyptic number.

140140665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

140140665 is an abundant number, since it is smaller than the sum of its proper divisors (151614855).

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

140140665 is a wasteful number, since it uses less digits than its factorization.

140140665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679 (or 3673 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 140140665 is about 11838.1022550069. The cubic root of 140140665 is about 519.4232572555.

The spelling of 140140665 in words is "one hundred forty million, one hundred forty thousand, six hundred sixty-five".