66122870 has 24 divisors (see below), whose sum is σ = 130827312. Its totient is φ = 24044240.

The previous prime is 66122867. The next prime is 66122879. The reversal of 66122870 is 7822166.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66122879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26114 + ... + 28533.

It is an arithmetic number, because the mean of its divisors is an integer number (5451138).

Almost surely, 2^66122870 is an apocalyptic number.

66122870 is a deficient number, since it is larger than the sum of its proper divisors (64704442).

66122870 is a wasteful number, since it uses less digits than its factorization.

66122870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54676 (or 54665 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 66122870 is about 8131.5970141172. The cubic root of 66122870 is about 404.3746279938.

The spelling of 66122870 in words is "sixty-six million, one hundred twenty-two thousand, eight hundred seventy".