140212666 has 32 divisors (see below), whose sum is σ = 246110400. Its totient is φ = 59230080.

The previous prime is 140212663. The next prime is 140212697. The reversal of 140212666 is 666212041.

It is not an unprimeable number, because it can be changed into a prime (140212663) 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, 18990 + ... + 25318.

It is an arithmetic number, because the mean of its divisors is an integer number (7690950).

Almost surely, 2^140212666 is an apocalyptic number.

140212666 is a deficient number, since it is larger than the sum of its proper divisors (105897734).

140212666 is a wasteful number, since it uses less digits than its factorization.

140212666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 140212666 is about 11841.1429347002. The cubic root of 140212666 is about 519.5121978706.

The spelling of 140212666 in words is "one hundred forty million, two hundred twelve thousand, six hundred sixty-six".