660142437 has 4 divisors (see below), whose sum is σ = 880189920. Its totient is φ = 440094956.

The previous prime is 660142429. The next prime is 660142447. The reversal of 660142437 is 734241066.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 660142437 - 2³ = 660142429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660142398 and 660142407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660142447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110023737 + ... + 110023742.

It is an arithmetic number, because the mean of its divisors is an integer number (220047480).

Almost surely, 2^660142437 is an apocalyptic number.

It is an amenable number.

660142437 is a deficient number, since it is larger than the sum of its proper divisors (220047483).

660142437 is a wasteful number, since it uses less digits than its factorization.

660142437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220047482.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 660142437 is about 25693.2371841308. The cubic root of 660142437 is about 870.7213979572.

The spelling of 660142437 in words is "six hundred sixty million, one hundred forty-two thousand, four hundred thirty-seven".