66519374 has 8 divisors (see below), whose sum is σ = 100193808. Its totient is φ = 33121440.

The previous prime is 66519347. The next prime is 66519413. The reversal of 66519374 is 47391566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68522 + ... + 69485.

It is an arithmetic number, because the mean of its divisors is an integer number (12524226).

Almost surely, 2^66519374 is an apocalyptic number.

66519374 is a deficient number, since it is larger than the sum of its proper divisors (33674434).

66519374 is a wasteful number, since it uses less digits than its factorization.

66519374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138250.

The product of its digits is 136080, while the sum is 41.

The square root of 66519374 is about 8155.9410247990. The cubic root of 66519374 is about 405.1812915939.

The spelling of 66519374 in words is "sixty-six million, five hundred nineteen thousand, three hundred seventy-four".