7426432664 has 128 divisors (see below), whose sum is σ = 17007943680. Its totient is φ = 2972851200.

The previous prime is 7426432661. The next prime is 7426432667. The reversal of 7426432664 is 4662346247.

It is an interprime number because it is at equal distance from previous prime (7426432661) and next prime (7426432667).

It is a super-2 number, since 2×7426432664² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7426432661) 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, 7330622 + ... + 7331634.

It is an arithmetic number, because the mean of its divisors is an integer number (132874560).

Almost surely, 2^7426432664 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 7426432664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8503971840).

7426432664 is an abundant number, since it is smaller than the sum of its proper divisors (9581511016).

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

7426432664 is a wasteful number, since it uses less digits than its factorization.

7426432664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1197 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 44.

The square root of 7426432664 is about 86176.7524567966. The cubic root of 7426432664 is about 1951.0126376653.

The spelling of 7426432664 in words is "seven billion, four hundred twenty-six million, four hundred thirty-two thousand, six hundred sixty-four".