140661404 has 36 divisors (see below), whose sum is σ = 267933960. Its totient is φ = 64584000.

The previous prime is 140661403. The next prime is 140661407. The reversal of 140661404 is 404166041.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140661403) 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 11 ways as a sum of consecutive naturals, for example, 169262 + ... + 170090.

It is an arithmetic number, because the mean of its divisors is an integer number (7442610).

Almost surely, 2^140661404 is an apocalyptic number.

It is an amenable number.

140661404 is a deficient number, since it is larger than the sum of its proper divisors (127272556).

140661404 is a wasteful number, since it uses less digits than its factorization.

140661404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1095 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 140661404 is about 11860.0760537190. The cubic root of 140661404 is about 520.0658250004.

The spelling of 140661404 in words is "one hundred forty million, six hundred sixty-one thousand, four hundred four".