66292619970 has 64 divisors (see below), whose sum is σ = 163983222144. Its totient is φ = 17140999680.

The previous prime is 66292619951. The next prime is 66292619993. The reversal of 66292619970 is 7991629266.

It is a happy number.

It is a super-2 number, since 2×66292619970² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66292619970.

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, 35164 + ... + 365816.

It is an arithmetic number, because the mean of its divisors is an integer number (2562237846).

Almost surely, 2^66292619970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66292619970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81991611072).

66292619970 is an abundant number, since it is smaller than the sum of its proper divisors (97690602174).

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

66292619970 is a wasteful number, since it uses less digits than its factorization.

66292619970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330867.

The product of its (nonzero) digits is 4408992, while the sum is 57.

The spelling of 66292619970 in words is "sixty-six billion, two hundred ninety-two million, six hundred nineteen thousand, nine hundred seventy".