663215742 has 64 divisors (see below), whose sum is σ = 1691159040. Its totient is φ = 188725248.

The previous prime is 663215737. The next prime is 663215759. The reversal of 663215742 is 247512366.

663215742 is a `hidden beast` number, since 6 + 63 + 21 + 574 + 2 = 666.

It is a super-2 number, since 2×663215742² = 879710240873221128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663215697 and 663215706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93733 + ... + 100559.

It is an arithmetic number, because the mean of its divisors is an integer number (26424360).

Almost surely, 2^663215742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663215742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845579520).

663215742 is an abundant number, since it is smaller than the sum of its proper divisors (1027943298).

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

663215742 is a wasteful number, since it uses less digits than its factorization.

663215742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7102 (or 7096 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 663215742 is about 25752.9754009124. The cubic root of 663215742 is about 872.0705262025.

The spelling of 663215742 in words is "six hundred sixty-three million, two hundred fifteen thousand, seven hundred forty-two".