666040151 has 16 divisors (see below), whose sum is σ = 775813440. Its totient is φ = 559975680.

The previous prime is 666040087. The next prime is 666040153. The reversal of 666040151 is 151040666.

It is a cyclic number.

It is not a de Polignac number, because 666040151 - 2⁶ = 666040087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666040153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167555 + ... + 171483.

It is an arithmetic number, because the mean of its divisors is an integer number (48488340).

Almost surely, 2^666040151 is an apocalyptic number.

666040151 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

666040151 is a deficient number, since it is larger than the sum of its proper divisors (109773289).

666040151 is a wasteful number, since it uses less digits than its factorization.

666040151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4394.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 666040151 is about 25807.7536992277. The cubic root of 666040151 is about 873.3067230430.

It can be divided in two parts, 66 and 6040151, that multiplied together give a triangular number (398649966 = T₂₈₂₃₆).

The spelling of 666040151 in words is "six hundred sixty-six million, forty thousand, one hundred fifty-one".