66867942 has 16 divisors (see below), whose sum is σ = 135620352. Its totient is φ = 21975240.

The previous prime is 66867937. The next prime is 66867947. The reversal of 66867942 is 24976866.

It is an interprime number because it is at equal distance from previous prime (66867937) and next prime (66867947).

It is a junction number, because it is equal to n+sod(n) for n = 66867891 and 66867900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66867947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78058 + ... + 78909.

It is an arithmetic number, because the mean of its divisors is an integer number (8476272).

Almost surely, 2^66867942 is an apocalyptic number.

66867942 is an abundant number, since it is smaller than the sum of its proper divisors (68752410).

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

66867942 is a wasteful number, since it uses less digits than its factorization.

66867942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157043.

The product of its digits is 870912, while the sum is 48.

The square root of 66867942 is about 8177.2820667995. The cubic root of 66867942 is about 405.8877888025.

The spelling of 66867942 in words is "sixty-six million, eight hundred sixty-seven thousand, nine hundred forty-two".