66651437202 has 32 divisors (see below), whose sum is σ = 158969889792. Its totient is φ = 18215299344.

The previous prime is 66651437183. The next prime is 66651437261. The reversal of 66651437202 is 20273415666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34497708 + ... + 34499639.

It is an arithmetic number, because the mean of its divisors is an integer number (4967809056).

Almost surely, 2^66651437202 is an apocalyptic number.

66651437202 is an abundant number, since it is smaller than the sum of its proper divisors (92318452590).

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

66651437202 is a wasteful number, since it uses less digits than its factorization.

66651437202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68997382.

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 66651437202 in words is "sixty-six billion, six hundred fifty-one million, four hundred thirty-seven thousand, two hundred two".