66428337502 has 16 divisors (see below), whose sum is σ = 99971852400. Its totient is φ = 33104521600.

The previous prime is 66428337497. The next prime is 66428337509. The reversal of 66428337502 is 20573382466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66428337509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 976824 + ... + 1042612.

It is an arithmetic number, because the mean of its divisors is an integer number (6248240775).

Almost surely, 2^66428337502 is an apocalyptic number.

66428337502 is a deficient number, since it is larger than the sum of its proper divisors (33543514898).

66428337502 is a wasteful number, since it uses less digits than its factorization.

66428337502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67451.

The product of its (nonzero) digits is 1451520, while the sum is 46.

The spelling of 66428337502 in words is "sixty-six billion, four hundred twenty-eight million, three hundred thirty-seven thousand, five hundred two".