66026940 has 48 divisors (see below), whose sum is σ = 211287552. Its totient is φ = 15091776.

The previous prime is 66026927. The next prime is 66026941. The reversal of 66026940 is 4962066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66026941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78184 + ... + 79023.

It is an arithmetic number, because the mean of its divisors is an integer number (4401824).

Almost surely, 2^66026940 is an apocalyptic number.

66026940 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66026940 is an abundant number, since it is smaller than the sum of its proper divisors (145260612).

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

66026940 is a wasteful number, since it uses less digits than its factorization.

66026940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157226 (or 157224 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 66026940 is about 8125.6962778583. The cubic root of 66026940 is about 404.1789799392.

It can be divided in two parts, 66026 and 940, that added together give a palindrome (66966).

The spelling of 66026940 in words is "sixty-six million, twenty-six thousand, nine hundred forty".