66319066 has 16 divisors (see below), whose sum is σ = 108880128. Its totient is φ = 30045600.

The previous prime is 66319007. The next prime is 66319067. The reversal of 66319066 is 66091366.

It is a super-2 number, since 2×66319066² = 8796437030224712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66319067) 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, 2071 + ... + 11701.

It is an arithmetic number, because the mean of its divisors is an integer number (6805008).

Almost surely, 2^66319066 is an apocalyptic number.

66319066 is a deficient number, since it is larger than the sum of its proper divisors (42561062).

66319066 is a wasteful number, since it uses less digits than its factorization.

66319066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9957.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 66319066 is about 8143.6518835225. The cubic root of 66319066 is about 404.7741788393.

The spelling of 66319066 in words is "sixty-six million, three hundred nineteen thousand, sixty-six".