66722597490 has 16 divisors (see below), whose sum is σ = 160134234048. Its totient is φ = 17792692656.

The previous prime is 66722597489. The next prime is 66722597519. The reversal of 66722597490 is 9479522766.

66722597490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×66722597490⁴ (a number of 44 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66722597490.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112043262 + ... + 1112043321.

It is an arithmetic number, because the mean of its divisors is an integer number (10008389628).

Almost surely, 2^66722597490 is an apocalyptic number.

66722597490 is an abundant number, since it is smaller than the sum of its proper divisors (93411636558).

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

66722597490 is a wasteful number, since it uses less digits than its factorization.

66722597490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224086593.

The product of its (nonzero) digits is 11430720, while the sum is 57.

The spelling of 66722597490 in words is "sixty-six billion, seven hundred twenty-two million, five hundred ninety-seven thousand, four hundred ninety".