66940952 has 48 divisors (see below), whose sum is σ = 142737840. Its totient is φ = 29253312.

The previous prime is 66940943. The next prime is 66940963. The reversal of 66940952 is 25904966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36653 + ... + 38435.

It is an arithmetic number, because the mean of its divisors is an integer number (2973705).

Almost surely, 2^66940952 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66940952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71368920).

66940952 is an abundant number, since it is smaller than the sum of its proper divisors (75796888).

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

66940952 is a wasteful number, since it uses less digits than its factorization.

66940952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840 (or 1817 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 66940952 is about 8181.7450461378. The cubic root of 66940952 is about 406.0354584123.

The spelling of 66940952 in words is "sixty-six million, nine hundred forty thousand, nine hundred fifty-two".