66736140 has 24 divisors (see below), whose sum is σ = 186861360. Its totient is φ = 17796288.

The previous prime is 66736079. The next prime is 66736141. The reversal of 66736140 is 4163766.

It is not an unprimeable number, because it can be changed into a prime (66736141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556075 + ... + 556194.

It is an arithmetic number, because the mean of its divisors is an integer number (7785890).

Almost surely, 2^66736140 is an apocalyptic number.

66736140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66736140 is an abundant number, since it is smaller than the sum of its proper divisors (120125220).

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

66736140 is a wasteful number, since it uses less digits than its factorization.

66736140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112281 (or 1112279 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 66736140 is about 8169.2190569234. The cubic root of 66736140 is about 405.6209344221.

The spelling of 66736140 in words is "sixty-six million, seven hundred thirty-six thousand, one hundred forty".