66320115 has 16 divisors (see below), whose sum is σ = 107853216. Its totient is φ = 34790400.

The previous prime is 66320101. The next prime is 66320117. The reversal of 66320115 is 51102366.

It is not a de Polignac number, because 66320115 - 2⁸ = 66319859 is a prime.

It is a super-2 number, since 2×66320115² = 8796715307226450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66320117) 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, 35326 + ... + 37155.

It is an arithmetic number, because the mean of its divisors is an integer number (6740826).

Almost surely, 2^66320115 is an apocalyptic number.

66320115 is a deficient number, since it is larger than the sum of its proper divisors (41533101).

66320115 is a wasteful number, since it uses less digits than its factorization.

66320115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72550.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 66320115 is about 8143.7162892625. The cubic root of 66320115 is about 404.7763129962.

The spelling of 66320115 in words is "sixty-six million, three hundred twenty thousand, one hundred fifteen".