665901342 has 48 divisors (see below), whose sum is σ = 1468401792. Its totient is φ = 218045520.

The previous prime is 665901331. The next prime is 665901343. The reversal of 665901342 is 243109566.

It is a happy number.

665901342 is a `hidden beast` number, since 66 + 590 + 1 + 3 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 665901297 and 665901306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665901343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 688143 + ... + 689109.

It is an arithmetic number, because the mean of its divisors is an integer number (30591704).

Almost surely, 2^665901342 is an apocalyptic number.

665901342 is an abundant number, since it is smaller than the sum of its proper divisors (802500450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665901342 is a wasteful number, since it uses less digits than its factorization.

665901342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613 (or 1610 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 665901342 is about 25805.0642704102. The cubic root of 665901342 is about 873.2460503969.

The spelling of 665901342 in words is "six hundred sixty-five million, nine hundred one thousand, three hundred forty-two".