66952020 has 48 divisors (see below), whose sum is σ = 190653120. Its totient is φ = 17550336.

The previous prime is 66952007. The next prime is 66952021. The reversal of 66952020 is 2025966.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66952021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5917 + ... + 12996.

It is an arithmetic number, because the mean of its divisors is an integer number (3971940).

Almost surely, 2^66952020 is an apocalyptic number.

66952020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66952020 is an abundant number, since it is smaller than the sum of its proper divisors (123701100).

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

66952020 is a wasteful number, since it uses less digits than its factorization.

66952020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18984 (or 18982 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 66952020 is about 8182.4214020056. The cubic root of 66952020 is about 406.0578351123.

Adding to 66952020 its reverse (2025966), we get a palindrome (68977986).

The spelling of 66952020 in words is "sixty-six million, nine hundred fifty-two thousand, twenty".