66715422 has 32 divisors (see below), whose sum is σ = 140832000. Its totient is φ = 21011328.

The previous prime is 66715417. The next prime is 66715427. The reversal of 66715422 is 22451766.

It is an interprime number because it is at equal distance from previous prime (66715417) and next prime (66715427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66715427) 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, 67798 + ... + 68774.

It is an arithmetic number, because the mean of its divisors is an integer number (4401000).

Almost surely, 2^66715422 is an apocalyptic number.

66715422 is an abundant number, since it is smaller than the sum of its proper divisors (74116578).

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

66715422 is a wasteful number, since it uses less digits than its factorization.

66715422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600.

The product of its digits is 20160, while the sum is 33.

The square root of 66715422 is about 8167.9509058270. The cubic root of 66715422 is about 405.5789555468.

The spelling of 66715422 in words is "sixty-six million, seven hundred fifteen thousand, four hundred twenty-two".