612166645 has 8 divisors (see below), whose sum is σ = 735005880. Its totient is φ = 489462720.

The previous prime is 612166637. The next prime is 612166663. The reversal of 612166645 is 546661216.

It can be written as a sum of positive squares in 4 ways, for example, as 81 + 612166564 = 9^2 + 24742^2 .

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

It is not a de Polignac number, because 612166645 - 2³ = 612166637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23590 + ... + 42199.

It is an arithmetic number, because the mean of its divisors is an integer number (91875735).

Almost surely, 2^612166645 is an apocalyptic number.

It is an amenable number.

612166645 is a deficient number, since it is larger than the sum of its proper divisors (122839235).

612166645 is a wasteful number, since it uses less digits than its factorization.

612166645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67655.

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

The square root of 612166645 is about 24742.0016368927. The cubic root of 612166645 is about 849.0955292587.

The spelling of 612166645 in words is "six hundred twelve million, one hundred sixty-six thousand, six hundred forty-five".