66918350 has 12 divisors (see below), whose sum is σ = 124468224. Its totient is φ = 26767320.

The previous prime is 66918347. The next prime is 66918377. The reversal of 66918350 is 5381966.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 669134 + ... + 669233.

It is an arithmetic number, because the mean of its divisors is an integer number (10372352).

Almost surely, 2^66918350 is an apocalyptic number.

66918350 is a deficient number, since it is larger than the sum of its proper divisors (57549874).

66918350 is a wasteful number, since it uses less digits than its factorization.

66918350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338379 (or 1338374 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 66918350 is about 8180.3636838468. The cubic root of 66918350 is about 405.9897552156.

The spelling of 66918350 in words is "sixty-six million, nine hundred eighteen thousand, three hundred fifty".