1420706660 has 72 divisors (see below), whose sum is σ = 3184508544. Its totient is φ = 532293120.

The previous prime is 1420706597. The next prime is 1420706671. The reversal of 1420706660 is 666070241.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1565927 + ... + 1566833.

Almost surely, 2^1420706660 is an apocalyptic number.

1420706660 is a gapful number since it is divisible by the number (10) 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 1420706660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1592254272).

1420706660 is an abundant number, since it is smaller than the sum of its proper divisors (1763801884).

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

1420706660 is a wasteful number, since it uses less digits than its factorization.

1420706660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1420706660 is about 37692.2626012289. The cubic root of 1420706660 is about 1124.1772842536.

The spelling of 1420706660 in words is "one billion, four hundred twenty million, seven hundred six thousand, six hundred sixty".