66242394 has 16 divisors (see below), whose sum is σ = 147205440. Its totient is φ = 22080780.

The previous prime is 66242389. The next prime is 66242437. The reversal of 66242394 is 49324266.

66242394 is a `hidden beast` number, since 6 + 624 + 23 + 9 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613302 + ... + 613409.

It is an arithmetic number, because the mean of its divisors is an integer number (9200340).

Almost surely, 2^66242394 is an apocalyptic number.

66242394 is an abundant number, since it is smaller than the sum of its proper divisors (80963046).

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

66242394 is a wasteful number, since it uses less digits than its factorization.

66242394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226722 (or 1226716 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 66242394 is about 8138.9430517728. The cubic root of 66242394 is about 404.6181311380.

The spelling of 66242394 in words is "sixty-six million, two hundred forty-two thousand, three hundred ninety-four".