66642350 has 12 divisors (see below), whose sum is σ = 123954864. Its totient is φ = 26656920.

The previous prime is 66642349. The next prime is 66642371. The reversal of 66642350 is 5324666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666374 + ... + 666473.

It is an arithmetic number, because the mean of its divisors is an integer number (10329572).

Almost surely, 2^66642350 is an apocalyptic number.

66642350 is a deficient number, since it is larger than the sum of its proper divisors (57312514).

66642350 is a wasteful number, since it uses less digits than its factorization.

66642350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332859 (or 1332854 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 66642350 is about 8163.4765878270. The cubic root of 66642350 is about 405.4308274168.

The spelling of 66642350 in words is "sixty-six million, six hundred forty-two thousand, three hundred fifty".