66275400 has 48 divisors (see below), whose sum is σ = 205455600. Its totient is φ = 17673280.

The previous prime is 66275383. The next prime is 66275423. The reversal of 66275400 is 457266.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54630 + ... + 55829.

It is an arithmetic number, because the mean of its divisors is an integer number (4280325).

Almost surely, 2^66275400 is an apocalyptic number.

66275400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66275400 is an abundant number, since it is smaller than the sum of its proper divisors (139180200).

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

66275400 is a wasteful number, since it uses less digits than its factorization.

66275400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110478 (or 110469 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 66275400 is about 8140.9704581211. The cubic root of 66275400 is about 404.6853217883.

The spelling of 66275400 in words is "sixty-six million, two hundred seventy-five thousand, four hundred".