1662500379 has 4 divisors (see below), whose sum is σ = 2216667176. Its totient is φ = 1108333584.

The previous prime is 1662500377. The next prime is 1662500387. The reversal of 1662500379 is 9730052661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1662500379 - 2¹ = 1662500377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662500377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277083394 + ... + 277083399.

It is an arithmetic number, because the mean of its divisors is an integer number (554166794).

Almost surely, 2^1662500379 is an apocalyptic number.

1662500379 is a deficient number, since it is larger than the sum of its proper divisors (554166797).

1662500379 is an equidigital number, since it uses as much as digits as its factorization.

1662500379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554166796.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 1662500379 is about 40773.7707233462. The cubic root of 1662500379 is about 1184.6423410993.

The spelling of 1662500379 in words is "one billion, six hundred sixty-two million, five hundred thousand, three hundred seventy-nine".