1999466700625 has 45 divisors (see below), whose sum is σ = 2521221764061. Its totient is φ = 1585178586000.

The previous prime is 1999466700617. The next prime is 1999466700631. The reversal of 1999466700625 is 5260076649991.

It is a happy number.

The square root of 1999466700625 is 1414025.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 156758189329 + 1842708511296 = 395927^2 + 1357464^2 .

It is not a de Polignac number, because 1999466700625 - 2³ = 1999466700617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 5762151702 + ... + 5762152048.

Almost surely, 2^{1999466700625} is an apocalyptic number.

1999466700625 is the 1414025-th square number.

1999466700625 is the 707013-rd centered octagonal number.

It is an amenable number.

1999466700625 is a deficient number, since it is larger than the sum of its proper divisors (521755063436).

1999466700625 is an frugal number, since it uses more digits than its factorization.

1999466700625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 64.

Multiplying 1999466700625 by its sum of digits (64), we get a square (127965868840000 = 11312200²).

The spelling of 1999466700625 in words is "one trillion, nine hundred ninety-nine billion, four hundred sixty-six million, seven hundred thousand, six hundred twenty-five".