140666515 has 16 divisors (see below), whose sum is σ = 184433760. Its totient is φ = 102142720.

The previous prime is 140666507. The next prime is 140666521. The reversal of 140666515 is 515666041.

It is a happy number.

It is not a de Polignac number, because 140666515 - 2³ = 140666507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42231 + ... + 45439.

It is an arithmetic number, because the mean of its divisors is an integer number (11527110).

Almost surely, 2^140666515 is an apocalyptic number.

140666515 is a deficient number, since it is larger than the sum of its proper divisors (43767245).

140666515 is a wasteful number, since it uses less digits than its factorization.

140666515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 140666515 is about 11860.2915225554. The cubic root of 140666515 is about 520.0721238717.

The spelling of 140666515 in words is "one hundred forty million, six hundred sixty-six thousand, five hundred fifteen".