66121270 has 8 divisors (see below), whose sum is σ = 119018304. Its totient is φ = 26448504.

The previous prime is 66121261. The next prime is 66121271. The reversal of 66121270 is 7212166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66121271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3306054 + ... + 3306073.

It is an arithmetic number, because the mean of its divisors is an integer number (14877288).

Almost surely, 2^66121270 is an apocalyptic number.

66121270 is a deficient number, since it is larger than the sum of its proper divisors (52897034).

66121270 is a wasteful number, since it uses less digits than its factorization.

66121270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6612134.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 66121270 is about 8131.4986318636. The cubic root of 66121270 is about 404.3713663657.

The spelling of 66121270 in words is "sixty-six million, one hundred twenty-one thousand, two hundred seventy".