66462140 has 24 divisors (see below), whose sum is σ = 144074112. Its totient is φ = 25727040.

The previous prime is 66462131. The next prime is 66462181. The reversal of 66462140 is 4126466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52979 + ... + 54218.

It is an arithmetic number, because the mean of its divisors is an integer number (6003088).

Almost surely, 2^66462140 is an apocalyptic number.

It is an amenable number.

66462140 is an abundant number, since it is smaller than the sum of its proper divisors (77611972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66462140 is a wasteful number, since it uses less digits than its factorization.

66462140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107237 (or 107235 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 66462140 is about 8152.4315391176. The cubic root of 66462140 is about 405.0650507714.

The spelling of 66462140 in words is "sixty-six million, four hundred sixty-two thousand, one hundred forty".