746686646 has 16 divisors (see below), whose sum is σ = 1156899840. Its totient is φ = 361068840.

The previous prime is 746686639. The next prime is 746686649. The reversal of 746686646 is 646686647.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (746686649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132335 + ... + 137861.

It is an arithmetic number, because the mean of its divisors is an integer number (72306240).

Almost surely, 2^746686646 is an apocalyptic number.

746686646 is a deficient number, since it is larger than the sum of its proper divisors (410213194).

746686646 is a wasteful number, since it uses less digits than its factorization.

746686646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7739.

The product of its digits is 6967296, while the sum is 53.

The square root of 746686646 is about 27325.5676244795. The cubic root of 746686646 is about 907.2203737945.

Subtracting from 746686646 its reverse (646686647), we obtain a palindrome (99999999).

The spelling of 746686646 in words is "seven hundred forty-six million, six hundred eighty-six thousand, six hundred forty-six".