66501015 has 32 divisors (see below), whose sum is σ = 123156480. Its totient is φ = 30011904.

The previous prime is 66500939. The next prime is 66501049. The reversal of 66501015 is 51010566.

It is not a de Polignac number, because 66501015 - 2⁷ = 66500887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4287 + ... + 12303.

It is an arithmetic number, because the mean of its divisors is an integer number (3848640).

Almost surely, 2^66501015 is an apocalyptic number.

66501015 is a deficient number, since it is larger than the sum of its proper divisors (56655465).

66501015 is a wasteful number, since it uses less digits than its factorization.

66501015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8111.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 66501015 is about 8154.8154485555. The cubic root of 66501015 is about 405.1440121902.

The spelling of 66501015 in words is "sixty-six million, five hundred one thousand, fifteen".