66153081 has 16 divisors (see below), whose sum is σ = 89939520. Its totient is φ = 43243200.

The previous prime is 66153029. The next prime is 66153119. The reversal of 66153081 is 18035166.

It is not a de Polignac number, because 66153081 - 2²² = 61958777 is a prime.

It is a super-2 number, since 2×66153081² = 8752460251585122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66153011) 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, 32026 + ... + 34028.

It is an arithmetic number, because the mean of its divisors is an integer number (5621220).

Almost surely, 2^66153081 is an apocalyptic number.

It is an amenable number.

66153081 is a deficient number, since it is larger than the sum of its proper divisors (23786439).

66153081 is a wasteful number, since it uses less digits than its factorization.

66153081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 66153081 is about 8133.4544321586. The cubic root of 66153081 is about 404.4362037734.

The spelling of 66153081 in words is "sixty-six million, one hundred fifty-three thousand, eighty-one".