66319254 has 24 divisors (see below), whose sum is σ = 145718352. Its totient is φ = 21794640.

The previous prime is 66319249. The next prime is 66319289. The reversal of 66319254 is 45291366.

It is a happy number.

It is a super-2 number, since 2×66319254² = 8796486902233032, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24669 + ... + 27224.

It is an arithmetic number, because the mean of its divisors is an integer number (6071598).

Almost surely, 2^66319254 is an apocalyptic number.

66319254 is an abundant number, since it is smaller than the sum of its proper divisors (79399098).

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

66319254 is a wasteful number, since it uses less digits than its factorization.

66319254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51972 (or 51969 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 66319254 is about 8143.6634262474. The cubic root of 66319254 is about 404.7745613209.

The spelling of 66319254 in words is "sixty-six million, three hundred nineteen thousand, two hundred fifty-four".