66334662240 has 192 divisors, whose sum is σ = 260514455040. Its totient is φ = 13783818240.

The previous prime is 66334662239. The next prime is 66334662283. The reversal of 66334662240 is 4226643366.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 66334662192 and 66334662201.

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, 860425 + ... + 934344.

It is an arithmetic number, because the mean of its divisors is an integer number (1356846120).

Almost surely, 2^66334662240 is an apocalyptic number.

66334662240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66334662240 is an abundant number, since it is smaller than the sum of its proper divisors (194179792800).

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

66334662240 is a wasteful number, since it uses less digits than its factorization.

66334662240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794805 (or 1794797 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 42.

The spelling of 66334662240 in words is "sixty-six billion, three hundred thirty-four million, six hundred sixty-two thousand, two hundred forty".