1020861966 has 16 divisors (see below), whose sum is σ = 2042037504. Its totient is φ = 340235064.

The previous prime is 1020861851. The next prime is 1020861967. The reversal of 1020861966 is 6691680201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020861967) 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, 67035 + ... + 80841.

It is an arithmetic number, because the mean of its divisors is an integer number (127627344).

Almost surely, 2^1020861966 is an apocalyptic number.

1020861966 is an abundant number, since it is smaller than the sum of its proper divisors (1021175538).

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

1020861966 is a wasteful number, since it uses less digits than its factorization.

1020861966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26135.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1020861966 is about 31950.9305967761. The cubic root of 1020861966 is about 1006.9061834985.

The spelling of 1020861966 in words is "one billion, twenty million, eight hundred sixty-one thousand, nine hundred sixty-six".