66340542 has 32 divisors (see below), whose sum is σ = 136442880. Its totient is φ = 21490880.

The previous prime is 66340517. The next prime is 66340543. The reversal of 66340542 is 24504366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66340543) 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, 117553 + ... + 118115.

It is an arithmetic number, because the mean of its divisors is an integer number (4263840).

Almost surely, 2^66340542 is an apocalyptic number.

66340542 is an abundant number, since it is smaller than the sum of its proper divisors (70102338).

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

66340542 is a wasteful number, since it uses less digits than its factorization.

66340542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088.

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

The square root of 66340542 is about 8144.9703498540. The cubic root of 66340542 is about 404.8178665881.

The spelling of 66340542 in words is "sixty-six million, three hundred forty thousand, five hundred forty-two".