612145666 has 8 divisors (see below), whose sum is σ = 1001692944. Its totient is φ = 278248020.

The previous prime is 612145663. The next prime is 612145693. The reversal of 612145666 is 666541216.

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

It is not an unprimeable number, because it can be changed into a prime (612145663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13912380 + ... + 13912423.

It is an arithmetic number, because the mean of its divisors is an integer number (125211618).

Almost surely, 2^612145666 is an apocalyptic number.

612145666 is a deficient number, since it is larger than the sum of its proper divisors (389547278).

612145666 is a wasteful number, since it uses less digits than its factorization.

612145666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27824816.

The product of its digits is 51840, while the sum is 37.

The square root of 612145666 is about 24741.5776780706. The cubic root of 612145666 is about 849.0858296240.

The spelling of 612145666 in words is "six hundred twelve million, one hundred forty-five thousand, six hundred sixty-six".