140531066 has 8 divisors (see below), whose sum is σ = 227011764. Its totient is φ = 64860480.

The previous prime is 140531047. The next prime is 140531077. The reversal of 140531066 is 660135041.

It can be written as a sum of positive squares in 2 ways, for example, as 115240225 + 25290841 = 10735^2 + 5029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×140531066² = 39497961022192712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 5405041 = 140531066 / (1 + 4 + 0 + 5 + 3 + 1 + 0 + 6 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2702495 + ... + 2702546.

Almost surely, 2^140531066 is an apocalyptic number.

140531066 is a deficient number, since it is larger than the sum of its proper divisors (86480698).

140531066 is a wasteful number, since it uses less digits than its factorization.

140531066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5405056.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 140531066 is about 11854.5799588176. The cubic root of 140531066 is about 519.9051429539.

The spelling of 140531066 in words is "one hundred forty million, five hundred thirty-one thousand, sixty-six".