66153420 has 36 divisors (see below), whose sum is σ = 200665920. Its totient is φ = 17640864.

The previous prime is 66153419. The next prime is 66153427. The reversal of 66153420 is 2435166.

66153420 is a `hidden beast` number, since 6 + 615 + 3 + 42 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (66153427) 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, 183580 + ... + 183939.

Almost surely, 2^66153420 is an apocalyptic number.

66153420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66153420 is an abundant number, since it is smaller than the sum of its proper divisors (134512500).

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

66153420 is a wasteful number, since it uses less digits than its factorization.

66153420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367534 (or 367529 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66153420 is about 8133.4752719855. The cubic root of 66153420 is about 404.4368946137.

Adding to 66153420 its reverse (2435166), we get a palindrome (68588586).

The spelling of 66153420 in words is "sixty-six million, one hundred fifty-three thousand, four hundred twenty".