1666962520 has 16 divisors (see below), whose sum is σ = 3750665760. Its totient is φ = 666784992.

The previous prime is 1666962509. The next prime is 1666962547. The reversal of 1666962520 is 252696661.

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, 20836992 + ... + 20837071.

It is an arithmetic number, because the mean of its divisors is an integer number (234416610).

Almost surely, 2^1666962520 is an apocalyptic number.

1666962520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666962520 is an abundant number, since it is smaller than the sum of its proper divisors (2083703240).

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

1666962520 is a wasteful number, since it uses less digits than its factorization.

1666962520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41674074 (or 41674070 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 1666962520 is about 40828.4523341260. The cubic root of 1666962520 is about 1185.7012519287.

The spelling of 1666962520 in words is "one billion, six hundred sixty-six million, nine hundred sixty-two thousand, five hundred twenty".