66047970240 has 2240 divisors, whose sum is σ = 318650112000. Its totient is φ = 12875563008.

The previous prime is 66047970211. The next prime is 66047970251. The reversal of 66047970240 is 4207974066.

It is a tau number, because it is divible by the number of its divisors (2240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 2871650869 + ... + 2871650891.

Almost surely, 2^66047970240 is an apocalyptic number.

66047970240 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 66047970240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159325056000).

66047970240 is an abundant number, since it is smaller than the sum of its proper divisors (252602141760).

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

66047970240 is a wasteful number, since it uses less digits than its factorization.

66047970240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 66047970240 in words is "sixty-six billion, forty-seven million, nine hundred seventy thousand, two hundred forty".