66405342 has 32 divisors (see below), whose sum is σ = 140325120. Its totient is φ = 20891520.

The previous prime is 66405337. The next prime is 66405371. The reversal of 66405342 is 24350466.

It is a super-2 number, since 2×66405342² = 8819338892273928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 34518 + ... + 36390.

It is an arithmetic number, because the mean of its divisors is an integer number (4385160).

Almost surely, 2^66405342 is an apocalyptic number.

66405342 is an abundant number, since it is smaller than the sum of its proper divisors (73919778).

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

66405342 is a wasteful number, since it uses less digits than its factorization.

66405342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 66405342 is about 8148.9472939761. The cubic root of 66405342 is about 404.9496294619.

The spelling of 66405342 in words is "sixty-six million, four hundred five thousand, three hundred forty-two".