66425700 has 72 divisors (see below), whose sum is σ = 209674080. Its totient is φ = 16102400.

The previous prime is 66425687. The next prime is 66425713. The reversal of 66425700 is 752466.

It is an interprime number because it is at equal distance from previous prime (66425687) and next prime (66425713).

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 23 ways as a sum of consecutive naturals, for example, 6765 + ... + 13364.

It is an arithmetic number, because the mean of its divisors is an integer number (2912140).

Almost surely, 2^66425700 is an apocalyptic number.

66425700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66425700 is an abundant number, since it is smaller than the sum of its proper divisors (143248380).

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

66425700 is a wasteful number, since it uses less digits than its factorization.

66425700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20157 (or 20150 counting only the distinct ones).

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

The square root of 66425700 is about 8150.1963166540. The cubic root of 66425700 is about 404.9910072687.

The spelling of 66425700 in words is "sixty-six million, four hundred twenty-five thousand, seven hundred".