140633661 has 16 divisors (see below), whose sum is σ = 223617024. Its totient is φ = 76867824.

The previous prime is 140633659. The next prime is 140633663. The reversal of 140633661 is 166336041.

140633661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (140633659) and next prime (140633663).

It is not a de Polignac number, because 140633661 - 2¹ = 140633659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140633663) 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, 145101 + ... + 146066.

It is an arithmetic number, because the mean of its divisors is an integer number (13976064).

Almost surely, 2^140633661 is an apocalyptic number.

It is an amenable number.

140633661 is a deficient number, since it is larger than the sum of its proper divisors (82983363).

140633661 is a wasteful number, since it uses less digits than its factorization.

140633661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291200.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 140633661 is about 11858.9063998330. The cubic root of 140633661 is about 520.0316314585.

The spelling of 140633661 in words is "one hundred forty million, six hundred thirty-three thousand, six hundred sixty-one".