66883940 has 24 divisors (see below), whose sum is σ = 141392832. Its totient is φ = 26575200.

The previous prime is 66883939. The next prime is 66883951. The reversal of 66883940 is 4938866.

It is a super-2 number, since 2×66883940² = 8946922859847200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66883891 and 66883900.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8054 + ... + 14093.

It is an arithmetic number, because the mean of its divisors is an integer number (5891368).

Almost surely, 2^66883940 is an apocalyptic number.

It is an amenable number.

66883940 is an abundant number, since it is smaller than the sum of its proper divisors (74508892).

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

66883940 is a wasteful number, since it uses less digits than its factorization.

66883940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22307 (or 22305 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 66883940 is about 8178.2602061808. The cubic root of 66883940 is about 405.9201554587.

The spelling of 66883940 in words is "sixty-six million, eight hundred eighty-three thousand, nine hundred forty".