66409692 has 48 divisors (see below), whose sum is σ = 159371520. Its totient is φ = 21514752.

The previous prime is 66409669. The next prime is 66409699. The reversal of 66409692 is 29690466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66409699) 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, 68193 + ... + 69159.

It is an arithmetic number, because the mean of its divisors is an integer number (3320240).

Almost surely, 2^66409692 is an apocalyptic number.

It is an amenable number.

66409692 is an abundant number, since it is smaller than the sum of its proper divisors (92961828).

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

66409692 is a wasteful number, since it uses less digits than its factorization.

66409692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 66409692 is about 8149.2141952461. The cubic root of 66409692 is about 404.9584715839.

The spelling of 66409692 in words is "sixty-six million, four hundred nine thousand, six hundred ninety-two".