1966637020 has 12 divisors (see below), whose sum is σ = 4129937784. Its totient is φ = 786654800.

The previous prime is 1966636979. The next prime is 1966637033. The reversal of 1966637020 is 207366691.

It is a super-2 number, since 2×1966637020² = 7735322336868960800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49165906 + ... + 49165945.

It is an arithmetic number, because the mean of its divisors is an integer number (344161482).

Almost surely, 2^1966637020 is an apocalyptic number.

1966637020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1966637020 is an abundant number, since it is smaller than the sum of its proper divisors (2163300764).

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

1966637020 is a wasteful number, since it uses less digits than its factorization.

1966637020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98331860 (or 98331858 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 1966637020 is about 44346.7813939185. The cubic root of 1966637020 is about 1252.8759423565.

The spelling of 1966637020 in words is "one billion, nine hundred sixty-six million, six hundred thirty-seven thousand, twenty".