1966155412 has 24 divisors (see below), whose sum is σ = 3768256800. Its totient is φ = 892074336.

The previous prime is 1966155403. The next prime is 1966155413. The reversal of 1966155412 is 2145516691.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966155413) 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, 317362 + ... + 323497.

It is an arithmetic number, because the mean of its divisors is an integer number (157010700).

Almost surely, 2^1966155412 is an apocalyptic number.

It is an amenable number.

1966155412 is a deficient number, since it is larger than the sum of its proper divisors (1802101388).

1966155412 is a wasteful number, since it uses less digits than its factorization.

1966155412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640935 (or 640933 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 1966155412 is about 44341.3510394079. The cubic root of 1966155412 is about 1252.7736621133.

The spelling of 1966155412 in words is "one billion, nine hundred sixty-six million, one hundred fifty-five thousand, four hundred twelve".