612666864 has 60 divisors (see below), whose sum is σ = 1719436576. Its totient is φ = 203648256.

The previous prime is 612666863. The next prime is 612666869. The reversal of 612666864 is 468666216.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612666863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47052 + ... + 58644.

Almost surely, 2^612666864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 612666864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859718288).

612666864 is an abundant number, since it is smaller than the sum of its proper divisors (1106769712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612666864 is a wasteful number, since it uses less digits than its factorization.

612666864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11974 (or 11965 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 612666864 is about 24752.1082738420. The cubic root of 612666864 is about 849.3267397660.

The spelling of 612666864 in words is "six hundred twelve million, six hundred sixty-six thousand, eight hundred sixty-four".