66551472000 has 768 divisors, whose sum is σ = 261449435520. Its totient is φ = 16124313600.

The previous prime is 66551471989. The next prime is 66551472011. The reversal of 66551472000 is 27415566.

It is a happy number.

66551472000 is a `hidden beast` number, since 66 + 551 + 47 + 2 + 0 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (66551471989) and next prime (66551472011).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 136655757 + ... + 136656243.

Almost surely, 2^66551472000 is an apocalyptic number.

66551472000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66551472000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130724717760).

66551472000 is an abundant number, since it is smaller than the sum of its proper divisors (194897963520).

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

66551472000 is a wasteful number, since it uses less digits than its factorization.

66551472000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

Adding to 66551472000 its reverse (27415566), we get a palindrome (66578887566).

The spelling of 66551472000 in words is "sixty-six billion, five hundred fifty-one million, four hundred seventy-two thousand".