648942966 has 96 divisors (see below), whose sum is σ = 1659528000. Its totient is φ = 183173760.

The previous prime is 648942961. The next prime is 648942977. The reversal of 648942966 is 669249846.

It is a super-2 number, since 2×648942966² = 842253946241754312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648942961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 548896 + ... + 550076.

It is an arithmetic number, because the mean of its divisors is an integer number (17286750).

Almost surely, 2^648942966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 648942966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (829764000).

648942966 is an abundant number, since it is smaller than the sum of its proper divisors (1010585034).

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

648942966 is a wasteful number, since it uses less digits than its factorization.

648942966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299 (or 1282 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The square root of 648942966 is about 25474.3589909540. The cubic root of 648942966 is about 865.7692894550.

It can be divided in two parts, 6489 and 42966, that added together give a triangular number (49455 = T₃₁₄).

The spelling of 648942966 in words is "six hundred forty-eight million, nine hundred forty-two thousand, nine hundred sixty-six".