612220665 has 32 divisors (see below), whose sum is σ = 1126388736. Its totient is φ = 278147520.

The previous prime is 612220663. The next prime is 612220669. The reversal of 612220665 is 566022216.

It is not a de Polignac number, because 612220665 - 2¹ = 612220663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (612220663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 771 + ... + 35000.

It is an arithmetic number, because the mean of its divisors is an integer number (35199648).

Almost surely, 2^612220665 is an apocalyptic number.

It is an amenable number.

612220665 is a deficient number, since it is larger than the sum of its proper divisors (514168071).

612220665 is a wasteful number, since it uses less digits than its factorization.

612220665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35949.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 612220665 is about 24743.0932787313. The cubic root of 612220665 is about 849.1205043706.

The spelling of 612220665 in words is "six hundred twelve million, two hundred twenty thousand, six hundred sixty-five".